A review of all my major modifications for the B6/B7 Audi S4

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Seeing as I've installed many modifications to my 2006 B7 S4, I figured it would help the community (and many of the new owners now that this car is becoming quite affordable) to have them reviewed in a single thread.

I've tried to remain objective throughout and I admit I've only provided short blurbs for each one. I recommend anyone considering one of these mods to perform a search on that specific mod for a more in-depth review (they've all been reviewed at some point or another).

So, without further ado, here's the list of mods:

JHM Stage 1 Supercharger
Mounts
JHM Ported Intake Manifold
JHM Stage 5R clutch and Pressure Plate
JHM Lightweight Flywheel
Stoptech ST-60 BBK
KW v3 Coilovers
JHM "Trio" Short Shifter
Trexturk Downpipes
Magnaflow Catback
Hotchkis 29mm Rear Sway Bar
JHM Intake Spacers
TT-RS Multi Function Steering Wheel
034 Adjustable Front Upper Control Arms
Zada-Tech gauges
STE Gauges
Dynavin D99 Android (Removed. Switched to Android Tablet)
Android Tablet Head Unit

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JHM Stage 1 Supercharger http://jhmotorsports.com/shop/catalo...h=21_56_61_240

Performance gains: 130whp gain above full exhaust and no tune setup (my setup prior to getting the SC)
Cost: $8,500 USD excluding shipping and labour
Installation difficulty: Fairly difficult (but does NOT require an engine pull)
Installation time: 2-5 days


JHM's supercharger is a centrifugal Vortech V3si supercharger that fits below the intake tubing/airbox. It requires the removal of one aux radiator (from
passenger side) and removal of the stock airbox and tubing (kit comes with new intake tubing and a cone K&N filter). Re-working the AC lines is also
required for fitment.
Overall, adding 130whp over a full exhaust setup is certainly felt (290whp --> 420whp). With headers, it can go to about 440whp. This power output is the
maximum the stock engine can handle so JHM had to dial down the supercharger's capabilities and keep the boost at a low 6psi@redline. The Vortech V3 in itself
is good for up to 600-650whp I believe. More information can be found on the V3si on Vortech's website (specs, etc.)

The torque is also drastically increased and can be clearly felt in all gears.

JHM has managed an 11.9 quarter mile with headers. I'm assuming without headers, you can probably get a 12.1/12.2 out of the kit. I don't have headers and
suck at drag racing so I've only managed a 12.53@113mph so far. I'm assuming with a better driver, my Avant had an easy 12.3 in it and probably a 12.2 with a perfect run.

JHM's priority was engine life (just for reference, my S4 currently has 93,000 miles on the engine) so the tune does reduce some power when the intake temps get too hot from things like bumper to bumper city driving.

Overall verdict: Fantastic mod and great value (even if it costs $8,500). Faster than a stock RS4 for arguably less money than upgrading to a stock RS4. That said, going beyond stage 1
gets a tad expensive as it requires an engine rebuild. Also, if I had been in the market for a sedan, I would have purchased an RS4 (and then supercharged that). I find many Avant owners are interested in this due to the fact that the RS4 Avant never made it to North America.

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Mounts
Stern Motor mounts http://jhmotorsports.com/shop/catalo...h=21_56_61_240
Performance gains: N/A
Cost: $270 USD
Installation Labour: couple hundred or so
Installation time: less than half a day


Apikol Rear Differential Mount http://jhmotorsports.com/shop/catalo...ssis-p-86.html
Performance gains: N/A
Cost: $240 USD
Installation Labour: couple hundred at the very most
Installation time: couple hours at the very most

Apikol Snub Mount http://jhmotorsports.com/shop/catalo...ssis-p-87.html
Performance gains: N/A
Cost: $34
Installation Labour: Approx $100 (requires service mode)
Installation time: Approx 1 hour

034 Transmission Mount http://jhmotorsports.com/shop/catalo...rs4-p-613.html
Performance gains: N/A
Cost: $70
Installation Difficulty: Fairly Easy
Installation time: Not sure, had it installed when replacing clutch

These are just good supporting mods. Helps keep the engine and transmission from moving too much. Mounts tend to go bad and why not replace them with a
better product. Not much else to say. I got them due to the supercharger purchase but would recommend them even if stock. Didn't really feel any extra vibrations
(I've got the street tranny mount. I hear the racing density tranny mount might add some mild vibrations).

The Apikol Snub Mount should be a must for all 6MT S4s and probably autos as well. It makes the 1-2 shift way smoother. No one should even bother to
think about this one. It's a $34 mod that makes the car way more enjoyable in bumper to bumper traffic. What are you waiting for? Just get'r done!

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JHM Ported Intake Manifold http://jhmotorsports.com/shop/catalo...40v-p-638.html
Performance gains: some top end whp (difficult to get an accurate number) Somewhere along 15chp in the higher RPMs probably
Cost: $1,050 USD
Installation Difficulty: Fairly easy
Installation time: less than half a day if you or your mechanic knows what they're doing

Nice mod to do for more top end performance gains. Also looks nice when powder coated in the colour of your choice (from the JHM available colours and finish). I got it as I wanted to make sure
everything flowed nicely for the supercharger.
Recommended if you've done all the other performance mods and still have some money left over in your budget.

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JHM Stage 5R clutch and Pressure Plate http://jhmotorsports.com/shop/catalo...h=21_56_61_105
Performance gains: N/A
Cost: $850 USD
Installation Difficulty: Medium (or whatever you consider a clutch replacement job to be as this is what it is)
Installation time: less than a day

This clutch is aggressive. I mean really aggressive. I was warned by JHM that it was going to be aggressive and they weren't kidding.
I got this clutch and pressure plate due to the stock RS4 pressure plate not being able to handle my extra power from the SC adequately.
The clutch pedal's weight is a little heavier than the stage 3 or 4 and you'll notice it right away but within a couple days, your leg will adjust and you
won't notice the extra weight. I'm pretty sure that if I drove a stock clutch, I'd feel like the pedal was loose or something :)

The chatter is obvious at low RPMs and requires small gas blips and not really letting go off the gas (i.e. a deliberate departure). This requires a slight change in driving style when in bumper to bumper traffic such as not moving forward the second the car in front of you moves 2 feet. Remember, this is a racing clutch. The pressure plate has no SAC (deemed to be the culprit in the stock RS4 PP issues).

Parallel parking is a little tougher as well as this clutch is mostly on or off.

After the 500 mile break-in period of city driving, I was finally able to beat on it and it's been holding well so far. I'm really enjoying it but I still get some
chattering from time to time if I'm not careful. Seriously requires you to focus on your driving when creeping at a slow pace. No difference when
driving at highway speeds.

Summary: Not recommended for stock or slightly modded S4s (stick with stage 3 or 4). Recommended for supercharged S4s and modded RS4s.

Update: Now that I've added many more miles, I'll say that I've gotten quite used to it and can now even creep with this clutch. That said, it still catches me from time to time if I'm not on the ball so to speak. Also, since the original write-up, the 5R has been officially released along with the 1R and 3R. Both the 1R and 3R are less aggressive and I'd recommend either one of those instead of the 5R unless you're a serious driver or seriously modded from a performance perspective. I love this 5R but I'm guessing most people would prefer a slightly less demanding clutch (which is why JHM also came out with the 1R and 3R).

Update 2: It has now been over 2.5 years since this clutch was installed and it's still holding up perfectly well and haven't experienced any issues.

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JHM Lightweight Flywheel http://jhmotorsports.com/shop/catalo...-s4-p-468.html
Performance gains: N/A
Cost: $925
Installation Difficulty: See clutch above. Should be performed during clutch upgrade/replacement
Installation time: less than a day with clutch upgrade/replacement

Great mod to do when upgrading your clutch. Makes the revs spool up way faster and makes the car feel way more responsive. Some mild chatter below 1200rpms can occur with a stage 3/4 clutch but easily avoidable with a few days of practice.

Summary: Highly recommended for anyone upgrading their clutch. I'm still using the same one with my Stage 5R clutch.

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Stoptech ST-60 BBK http://www.stoptech.com/Search/Produ...NA/BigBrakeKit
Performance gains: No acceleration performance but increased track performance from better and more confident braking
Cost: $3000? (I got them used so not sure)
Installation Difficulty: Fairly easy
Installation time: less than a day

The stock brakes on the S4 are actually quite decent for every day driving so this mod is more of a luxury if you're never going to track the car.
If you are going to track the car, the extra rotor size, stronger calipers, ease of swapping pads (from street to track and back) and to a certain degree, the curved vented rotor design will for sure help.

Now, I'll be outright honest and say that I haven't tracked this kit yet. I was planning to this year and even have brand spanking new track pads but
never got around to it. I hope to next year.

For street pads, I'm running Carbotech Bobcats. I started with the stoptech pads but didn't actually like them all that much and much prefer the
Bobcats. However, even those I was starting to get a little fading with hard driving in back country roads after 15 minutes of really hard driving. So in the end, the BBK is going
to be only as good as the pads you're running (and tires for braking distance). That said, you'll probably be able to last twice as long from hard
driving with this kit than on the stock setup (twice as long is a number I pulled out of my ass based on feelings, not a scientific number from actual controlled testing).

Summary: If you're never going to track the car and you don't go on extended hard driving cruises, there's no point in getting a BBK unless you want to
pay thousands for a minor weight reduction and a cool look. Also, remember that Stoptech doesn't provide a rear kit, only a front one so you will have a
disconnect between front and rear calipers from a looks perspective. From a braking perspective, Stoptech claims to take into account your stock rear
calipers. I certainly haven't felt any weird vehicle unbalancing from hard braking so it might be true.

If you are planning to track the car, it's a good option as these are considerably cheaper than official Brembos or Alcons and are 6 pistons as well. Just
remember to get a track pad set and make sure that they'll play nice with your street pads. I got the Carbotech Bobcats for street and Carbotech XP12s
for track which, according to Carbotech play well together but I still haven't tested it yet. I did ask for the XP12s to be pre-bedded though as bedding
in track pads is not easy to do on the street nor the track. Also, when installing the rotors, make sure the curved vents are placed correctly. The
vents should EXPEL air, not suck it in.

Alternative: JHM's Porsche Cayenne Brembo BBK for half the price of the Stoptechs. I hear those calipers aren't as good but they'll be better than stock.

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KW v3 Coilovers http://kw-suspension.com/us/kw_variant_3.php
Performance gains: No acceleration performance but increased track performance from better handling
Cost: I bought them new from some US website for $2,000
Installation Difficulty: Medium
Installation time: less than a day

These are common coilovers for our S4s. KW only sells the V3 for the S4 (The V1 might be available under their subsidiary company but I don't remember
the name or if that's even accurate). These are 3 way adjustable (damping, rebound and height) which is nice as I've changed the settings a few times to the point where I like it
best. However, changing the settings is not that simple and once you like the setting, you're going to want to leave it as is. Don't kid yourself and
think that you can easily change the settings just before a track day and change them back to a street like setting when you're done, especially the top setting (don't remember which is which but there's one at the top and one at the bottom of the shocks. The bottom one is relatively easy to get to but the top is near impossible without taking things apart).

They're stainless and shouldn't rust and don't need yearly rebuilds. They do feel better than the stock suspension from a comfort level when set to a regular firmness. I find I can corner a lot better with these but I have to admit that sometimes I feel like they're going to be too loose when taking a hard turn but then they just work. A little misleading at times but they've never let me down.

A few things to note though, they do creak in cold temps which can be slightly annoying, especially on a luxury car (creaking is more pronounced the lower you go). Then they creaked even more when I
installed my Adjustable Front Upper Control Arms and tightened everything even more. The creaking doesn't impact performance though. That's pretty much my only beef with them. I live in a cold climate and in the dead of winter, if I have passengers and they hear that, they start wondering if something's wrong with the car.

This year though, I decided to raise them half an inch for the winter (I was plowing snow a little too much last year). It seems to have helped reduce the creaking a bit.

Summary: Great handling mod and highly recommended. Good "goldilocks" price point but if you live in a cold winter climate, expect some creaking noises.

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JHM "Trio" Short Shifter http://jhmotorsports.com/shop/catalo...rs4-p-539.html
Performance gains: No direct acceleration performance but faster and more precise shifting so possible better acceleration times
Cost: $480
Installation Difficulty: Easy for the shifter on its own. Somewhere between fairly easy to medium for the linkage and bushing.
Installation time: Approx. 2-3 hours with fine tweaking (again, assuming the shop knows what its doing. If your shop has never installed these parts before, add an extra 1-3 hours depending on whether they've spent the 20 minutes viewing the installation video).

I believe this was one of the first (if not THE original) part JHM made. It's probably the best in the business (I say probably because I haven't tried others, heck, I don't even know if other brands are available but I haven't ever read of anyone complaining once it's adjusted properly).

For me, a short shifter has always been the first mod I've installed on any car I've owned. Even shitboxes. I hate sloppy long throws. So it's only normal I got JHM's trio package. The "Trio" is the short shifter itself, the linkage and a bushing. The parts can be bought separately but you save a few bucks by buying all three together.

The installation of the linkage and bushing does require the downpipe to be removed for accessibility so I recommend doing this mod along with your downpipe upgrade (be it piggies or a brand new catless downpipe).
The shifter on its own can be installed without any other parts needing to be removed.
I also believe the linkage install needs you to shave a small piece of metal for clearance but JHM would be able to provide more insight on that so you should really ask them directly.

As for the feel, assuming it's adjusted properly, it's just fantastic. A few people sometimes complain about this part but every time, it's simply been a matter of adjustment. It can be tricky and requires patience to get it just right (some will say it's super easy but I've read enough people asking for help on how to adjust it that it might be a little challenging for some people). However, with enough patience, it'll finally get adjusted properly and you'll be laughing. With all three pieces working together, you really feel the metallic precision over the stock sloppy feel.

The kit also comes with 3 springs for the reverse (depending on how much push back you want). I haven't read a single person mention they're using the softest one (some have tried it and then switched to the medium one). I think the soft one is seriously too soft (I mean, if you want a harder, stronger shifter, you're probably not going to go with a softer spring for reverse). I think I'm on the medium one and it's perfect. Just enough pushback not to accidentally go into reverse but not so much that it's difficult.

Summary: Strongly recommended. You'll love driving stick all over again. At first, you might find it's quite short but you'll get used to it in 2-3 days. Honestly, after a few years, I'd actually want an even shorter one at this point. I'm probably not the norm though so it's probably not worth it for JHM to try something even shorter.

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Trexturk Downpipes (Send Trexturk a PM)
Performance gains: Approx. 20chp with a 2.5" catback. Approx. 30-40chp with a 2.5" catback AND JHM tune I'd say.
Cost: $500
Installaton Difficulty: Fairly easy
Installation time: 2-3 hours depending on bolt conditions.

It's a catless downpipe. It's 2.5". It simply works. Fitment is perfect. I haven't read of a single person that's complained of fitment other than people who didn't order exactly how they should have ordered. Trexturk asks how you want it to mate to the catback (i.e. whether you have a 2.5" catback or still using the OEM size or somewhere in between).
They're made out of aluminized steel instead of stainless steel I believe and I haven't seen any rust issues (and I live in snowy Canada and I'm lowered) after 2+ years.

You can't really go wrong with this downpipe and there's a reason why he's sold so many. I don't know if he's still making them (I think he is). All you need to do is send him a PM. He doesn't advertise them so you need to seek him out yourself. Also, I think he mostly does these to help other S4 owners out. Don't expect him to have all this inventory. You might need to wait a little bit.
You also need to tell him if you have a 6MT or Auto as believe they're slightly different.

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Magnaflow Catback http://www.magnaflow.com/02product/s...e=all&id=10842
http://www.magnaflow.com/02product/s...e=all&id=10826
Performance gains: Approx 20chp with 2.5" catless downpipes
Cost: Just under $700 with Performance Peddler AUDIPIPES coupon for S4, $1100 or so for the RS4 (AUDIPIPES coupon doesn't work for the RS4 version) BUT you seem to be able to "enter your own price" for the RS4 exhaust. Try starting at $600 and work your way up I guess.

This is a stainless steel, 2.5" catback exhaust. I initially bought the S4 version (the main difference being the tips I think) due to the great pricing from Performance Peddler and the fact that I actually love the Magnaflow sound (slightly deeper note than the Fast Intentions sound). It has an X-Pipe (better for performance than an H-Pipe). The S4 version has single 4" single tips on either side and it's really for the B6 S4, not so much for the B7 S4.
Also, the S4 version comes with resonators, the RS4 version does not. And finally, the RS4 version comes with two 3" tips on either side (quad tips).

So I installed them and then over the course of a couple months, decided I didn't like the single 4" tips in conjunction with my stock B7 rear valence (which is really cut-out for an OEM quad tip look).
I didn't know what to do. I looked at just changing the tips but that wasn't proving to be too easy. I considered replacing the mufflers and tips but then that would make the original price not such a great deal anymore.

Then, someone local to me that I knew decided to sell his RS4 Magnaflow Catback (he was bringing his RS4 back to stock).
I therefore bought it from him (the full catback, all three portions), took my S4 muffler/tips portion out and replaced it with the RS4 one (kept the other two portions as is).

So ultimately, I ended up with the X-Pipe piece from the S4 version, the resonated middle piece from the S4 version and the muffler/quad tips portion from the RS4 version. For me, it was exactly what I wanted (why can't Magnaflow sell it like that for the B7, I really don't know). And now I love it.

Summary: This is a tough one if you own a B7 S4. On one hand, the price is great with the coupon but you're left with the single tips on either side dilema. If you have a B6 S4, no worries, the 4" single tips will work perfectly. You can go with the RS4 version for the B7 S4 but then you lose the resonators and you're now in the same price point as most other catbacks (and if you're looking at catbacks in the 1500+ price range, well, good for you for having all that extra dough).

So yeah, I love the sound it makes. There is some slight droning in the 1800-2100 RPM range but I don't find it to be excessive (I've heard way worse). But it is there and I must point it out. I don't think I've heard a single after market exhaust setup on our cars that didn't. It just comes down to how much of it. Tough call. In the end, catbacks are quite subjective so you're on your own on this one.

Note: See the exhaust compilation thread for plenty of alternatives here: http://www.audizine.com/forum/showth...st-compilation

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Hotchkis 29mm Rear Sway Bar http://jhmotorsports.com/shop/catalo...-s4-p-393.html
Performance gains: No acceleration gains but great handling gains. Less understeer.
Cost: $239
Installation difficulty: Easy
Installation time: Approx 30 mins to an hour

This is a fantastic and easy mod. It helps keep the back end flatter in corners and helps balance the car more (less understeer). I decided to only get the rear rather than both the front and rear. I've heard getting both is also great but I've never driven an S4 that had both. With just the rear though, I felt the change immediately and felt the car way more balanced. Now, this bar has two settings. Soft and hard. Don't bother using the soft setting. Firstly, why go with a bigger Rear Sway Bar if you're only going to "somewhat" use it by using the soft setting, but secondly (and more importantly), you're probably going to end up snapping your endlinks if you use the soft setting. This is because the soft setting allows for more flex. More flex means more strain on the endlinks which means a snapped endlink. Using the hard setting reduces that amount of flex and gives your endlinks a
fighting chance. That said, your stock endlinks might still break after a little bit but the good news is that there are options to replace them with stronger ones (I think Stern and 034 have some to offer).
I snapped my OEM ones within 5 weeks and at the time, the Sterns were getting poor reviews (they since revised them) and the 034 ones didn't exist yet so I went with one that BenSTI custom made at the time and they've held up great. The Stern and 034 ones look to be just as good.

Summary: Highly recommended. Cheap and easy mod and it makes the car's handling so much better. I think this one should be a no brainer.

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JHM Intake Spacers http://jhmotorsports.com/shop/catalo...v-v8-p-295.htm
Performance gains: No direct gains but better heat management which affects performance so small indirect performance gain
Cost: $160
Installation difficulty: Fairly easy
Installation time: 2-3 hours

I got these to get the most out of my supercharger but they're just as useful on stock power. Their intent is to keep things cooler and we all know this engine gets freaking hot and performance is hindered from all that heat. These aren't suddenly going to cool everything to room temperature so make sure you have the right expectations first. However, they're a good part of the overall puzzle.
I was able to get my best 1/4 mile time after 6 back to back runs (by back to back, I mean there was no line up at the track so zero waiting). My point being, although these don't add any power directly, they allowed me to keep going and still get good runs in. So I consider these more of a supporting mod.

Summary: These are pretty cheap to buy and install and help with temps. Why not get them?

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TT-RS Multi Function Steering Wheel
Cost: $1200 used ($1500-$1600 new? Not sure)
Installation difficulty: Easy with proper instructions
Installation time: 30 minutes

I freaking LOVE this steering wheel. It just makes the car so much more enjoyable to drive. It was one of my last mods and after getting it, I felt it should have been one of my first after all the basic bolt-on stuff.
Basically, it's the fact that it's thicker and smaller. I don't really care for the flat bottom part of the steering wheel but the smaller and thicker feel of it just feels right. I since drove a stock S4 with stock steering wheel and felt I was driving a bus. Thing to note. It uses a two stage airbag and I wouldn't recommend this for a B6 even though there are adapter rings and stuff for it. People do it all the time but I just wouldn't feel right about it. To each their own.

The TT-RS and the C6 RS6 steering wheels are the same except that the TT-RS has perforated leather all around whereas the RS6 mostly has smooth leather with only a small perforated leather part. I initially wanted the RS6 one but the TT-RS came up for sell used locally so jumped on it. In the end though, I actually prefer the full perforated leather. It actually really does help with grip (more than I expected).


Summary: Surprisingly fantastic mod. Yes, it's pricey for just a steering wheel. Yes, it feels like a total luxury (one of the reasons I left it as one of my last mods) but man, it just makes the car feel awesome. Don't under-estimate just how much it adds to the driving experience. And think about it, when you're driving, there's one thing you're ALWAYS holding. Might as well make it awesome.

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034 Adjustable Front Upper Control Arms http://jhmotorsports.com/shop/catalo...rs4-p-640.html
Performance gains: No acceleration gains but better handling. Tighter front end.
Cost: $390
Installation difficulty: Medium
Installation time: 2-3 hours

I got these because my OEM ones were shot. I figured since I was lowered, I might as well get the adjustable ones. I got these because the adjustment isn't in the middle of the arm and felt they would be stronger. After having them installed, the first time driving, I was really surprised just how tight my front end became. Sure, I was going from shot to brand new so that made a big difference but still, the front end felt way tighter than it had ever been. I was happily surprised. I'd note though that I heard adjusting these are tougher than typical ones (where the adjustment is in the middle). My mechanic knows an alignment shop down the street from him and called them (before I ordered these) to ensure they wouldn't have problems adjusting them and they said they knew them well and had no problems with them so that helped. Maybe check yourself with your mechanic first. It might not be that big of a deal but still worth checking I think.

Summary: Didn't expect such a huge difference after installing them. Highly recommended. Just make sure you have someone that's ok with them and knows how to adjust them ahead of time.

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Zada-Tech gauges http://www.zada-tech.com/product/mul...ge-oem-looking
Cost: 110 British Pounds + which ever modules you want to add
Installation difficulty: Cluster section, fairly easy. Sensor section in the engine bay, medium to difficult
Installation time: Anywhere from 3 hours to days depending on which sensors you go with

I initially got the Zada-Tech gauges because I want oil temp and supercharger boost and wanted something integrated into my cluster rather than go with unsightly gauges on my A pillar or steering wheel.
I then added the oil pressure and intake temp sensors.

Overall, the sensor section was a bitch and a half to install. I'm talking custom work every where. My mechanic had to make new fittings and shit to make it all work. And in the end, I still didn't get a proper oil temp reading because I would have had to make a hole in the underside of my oil pan (we tapped it in a different spot hoping it would work but it's not accurate and I didn't want to go all out).

I did get oil pressure though so that's pretty good. Got boost, got intake temp and everything.
It also comes with a little button that acts as a joystick which is ok.
The cluster section replaces your LCD clock and although Zada-Tech claims the LCD quality is the same, it's far from OEM quality. It's somewhat difficult to read in the day and if I have my sunglasses on, impossible.

Summary: At the time of purchase, these gauges were the only available option I found that could be seemlessly integrated into the cluster. However, now that STE has come out with their integrated cluster gauges, the Zada-Tech gauges just aren't refined enough and require way too much custom work with the sensor installations to make it worth while. So not really recommended and if you want proper integrated gauges, just go with the STE ones (see post below).

Here's a video of the Zada-Tech gauges in action:

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STE Gauges
See my review and pics http://www.audizine.com/forum/showth...eview-and-Pics

Summary for STE gauges, highly recommended. They may seem expensive at first but they're well worth it.

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Dynavin D99 Android
Cost: $800-$900
Installation difficulty: Fairly easy to medium depending on your stereo skills
Installation time: 4-8 hours depending on your stereo skills

I hated the old RNS-E (the new one is way better I hear) due to its limitations so I wanted something aftermarket that fit nicely and looked somewhat OEM and could have wifi capabilities and the Dynavin, with the Android OS provided all of this as well as the Android Marketplace.

My first time using this, I wasn't all that impressed. It was quite buggy, kept crashing, and I ended up losing half my audio output and the wifi never worked. Great...I figured I just threw loads of money in the trash.
However, before completely giving up, I figured I'd give my warranty a chance. I therefore sent it back to the US vendor I bought it from and sent them an email with every issues I had.
5 months later (yes, 5 months! good thing I kept my RNS-E which I put back in place during that time) I finally got the unit back. I'm pleased to report that it works flawlessly now. I've had it for a year since I got it back and the wifi has NEVER failed me. The system has never crashed and the audio is great. Now, it's not up to the standard of an audiophile. This isn't a unit meant to wow you in terms of sound quality, it's a unit designed to give you plenty of great functionality.

So in the end, I'm quite happy with it and it's still in the car to this day.

A few things to note though. It uses an old version of Android (2.2 I believe) which is way out of date and not every Android app will run on it. Secondly, the processor and memory is nothing to write home about. Running more than two heavy apps will probably end up causing one of those apps to crash. For example, running winamp and Sygic navigation at the time same can be hit and miss. Google Maps seems to be less resource intensive though and I usually end up using that when I'm in my neck of the woods. However, I need to use my cell phone's wifi and if I'm abroad, I'm not going to turn on my wifi and pay roaming fees so I use Sygic (off line navigation).

Also, I still haven't found a USB hub that will allow me to have wifi and bluetooth on at the same time. Some other Dynavin users have claimed to find some but they're usually no-name ones and they just got lucky. I would like to have wifi and bluetooth on at the same time so that I could buy a bluetooth OBD2 reader and have Torque running on the unit while retaining internet access. At this point though, it's not the end of the world and I haven't really kept searching.

So it does have some minor issues but overall, I'm happy with my purchase. Now, if some manufacturer (known brand, not some chinese no name) comes up with their own, more modern version of an Android based system, I might consider upgrading. Until then, I'll stick with the D99.

See my pics here http://www.audizine.com/forum/showth...d-Dynavin-unit

Update: I removed the Dynavin unit as it was becoming outdated and was stuck on Android 2.2 and Dynavin seems to have abandoned their Android support in favour of their own OS. I therefore switched to an Android tablet and the write up can be seen here: http://www.audizine.com/forum/showth...t-sound-system

[Nillamb]

A fantastic resource. I always enjoy reading others experiences with mods and planning my next possible upgrade... budget permitting, lol. Thanks for the posts.

I'm surprised about the requirement for a new stage 5R "racing" style clutch. This on/off style clutch would really be a deal breaker for me if I were ever to seriously consider the supercharger upgrade. If I wasn't launching/racing/quatermile-ing the car, would I be ok with the less aggressive stage 4?

[Axel-]

A fantastic resource. I always enjoy reading others experiences with mods and planning my next possible upgrade... budget permitting, lol. Thanks for the posts.

I'm surprised about the requirement for a new stage 5R "racing" style clutch. This on/off style clutch would really be a deal breaker for me if I were ever to seriously consider the supercharger upgrade. If I wasn't launching/racing/quatermile-ing the car, would I be ok with the less aggressive stage 4?

The problem with the stage 4 is that it uses the OEM RS4 PP from Audi which even stock RS4s have had some issues with. It's certainly not every one that had issues but I don't know if I'd take the chance. There are other clutch options on the market for our cars but I can't comment on their reliability on 400+whp S4s as I've never tried one and there are many out there using them (or not many people who've SC'd their S4 have posted reviews of their clutches).

[FulhamFTW]

I looked into the RS4 exhaust through performance peddler and I'm pretty sure the discount is available. If the coupon doesn't work, just type in your offer and they will bring the price down.

[Mr.Wrong]

Awesome reviews!

[Axel-]

I looked into the RS4 exhaust through performance peddler and I'm pretty sure the discount is available. If the coupon doesn't work, just type in your offer and they will bring the price down.

Thanks for sharing. I checked myself that the coupon didn't work but never tried entering my own price. Will edit to include that.

[QIKRNU]

First: Great write up. Thanks much; excellent info.

Second: (Picky, picky, I know) in the intake spacer section " My point being, although these add any power directly,"

[nnnick]

This thread delivers. Thanks!!!

[Axel-]

First: Great write up. Thanks much; excellent info.

Second: (Picky, picky, I know) in the intake spacer section " My point being, although these add any power directly,"

I'm a stickler for detail and accuracy so thanks for pointing that out. I'll edit when I get home (for some reason, can't edit on this mobile interface).

[Baggio]

Have you ever thought about some sort of custom intercooler set up for that Vortech or is it impossible due to the space limitations with this car? The pics from JHM's website makes it look like it would be impossible.

[Axel-]

Have you ever thought about some sort of custom intercooler set up for that Vortech or is it impossible due to the space limitations with this car? The pics from JHM's website makes it look like it would be impossible.

They're actually finishing up the intercooler for the supercharger. It's pretty massive so you're right about space. They include their "battery relocation kit to the trunk" to make it fit :)

[Baggio]

They're actually finishing up the intercooler for the supercharger. It's pretty massive so you're right about space. They include their "battery relocation kit to the trunk" to make it fit :)

Is the intercooler going to be a front mount?

Here a large size custom intercooler on my Mustang GT and it was tight to fit with a lot more space than an S4. I'd be interested in seeing how the S4 intercooler design comes out.

[Axel-]

No, it's not an air to air. It's water based with a massive reservoir in place of the battery.

[Baggio]

No, it's not an air to air. It's water based with a massive reservoir in place of the battery.

Is it the Vortech aftercooler? I am familiar with that setup.

[Axel-]

A fantastic resource. I always enjoy reading others experiences with mods and planning my next possible upgrade... budget permitting, lol. Thanks for the posts.

I'm surprised about the requirement for a new stage 5R "racing" style clutch. This on/off style clutch would really be a deal breaker for me if I were ever to seriously consider the supercharger upgrade. If I wasn't launching/racing/quatermile-ing the car, would I be ok with the less aggressive stage 4?

And I have to say that I've gotten nicely used to it. Took about 2 weeks to fully adjust but now it's actually become enjoyable. And the little blips sound cool too haha.
(I spent 2 hours in city traffic today running errands and I was thinking about what you wrote). Still, it's really for drivers who enjoy driving manual all the time.

[Dolphin08]

Your posts make me excited to see the results of my s4 once I get all my ordered parts installed. Although I'm lazy and not doing the install myself, the results should still be just the same.

[QIKRNU]

Your posts make me excited to see the results of my s4 once I get all my ordered parts installed. Although I'm lazy and not doing the install myself, the results should still be just the same.

Ordered parts?? Maybe you could elucidate.

[Baggio]

Ordered parts?? Maybe you could elucidate.

Maybe his garage is stocked with parts that need to be installed?

[Mr.Wrong]

Axel_ how do you like your Stern motor mounts and which version did you get street or race? I'm on the fence with which ones to go, Stern or 034Motorsport...

[Dolphin08]

Oops, the description "parts" could mean anything. I've ordered the JHM Intake manifold and spacers, JHM tune, 034 snub mount, JHM L/w crank pulley, FI resonated catback and catted milltek dp's. It should almost be a completely different car and I hope it turns out as well as all of your vehicles.

[QIKRNU]

I most heartily concur, sir.

[Axel-]

Axel_ how do you like your Stern motor mounts and which version did you get street or race? I'm on the fence with which ones to go, Stern or 034Motorsport...

I like them very much and I went with street. I went with street for all my mounts whenever there was an option. I don't want my vehicle to have a vibration at idle, however small. It is foremost a luxury car after all :)

[Axel-]

Is it the Vortech aftercooler? I am familiar with that setup.

It's a custom made air/water intercooler I believe.