3.0t headers vs test pipe

[sage0607]

Does anyone know if the headers give you a bump in power over if you get test pipes on these cars? I would love to know as I've seen some people picking up about 20 to the wheels with headers from stock cats but not from test pipes to headers

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[RoofRails]

Does anyone know if the headers give you a bump in power over if you get test pipes on these cars? I would love to know as I've seen some people picking up about 20 to the wheels with headers from stock cats but not from test pipes to headers

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I haven't seen any measurable differences in HP between headers and test pipes. But sound wise from all the clips I have heard it's headers for the win !

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[sage0607]

I haven't seen any measurable differences in HP between headers and test pipes. But sound wise from all the clips I have heard it's headers for the win !

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Interesting! I would have though with the longer piping the scavenging would be better for some more power

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[wes8398]

General consensus has been long established that headers result in a negligible improvement over test pipes, and not worth the extra labour involved in installing them (engine removal for DSGs or significant monkeying around with ratchet straps for 6mts).
In terms of sound, headers sound just as bad as test pipes if you're comparing apples to apples. It's all in how you suppress the rasp with various mufflers, resonators, downstream cats, etc.

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[hunter_killer]

I hate to ask but has anyone ever flow tested the manifolds and then a set of headers? I can’t imagine that the factory manifolds flow that well that a set of headers aren’t a gain (headers are almost never an easy install so the labor point is mute mostly). I haven’t seen very many dyno sheets, 1/8, or 1/4 slips between manifolds and headers for a comparison.


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[sage0607]

I hate to ask but has anyone ever flow tested the manifolds and then a set of headers? I can’t imagine that the factory manifolds flow that well that a set of headers aren’t a gain (headers are almost never an easy install so the labor point is mute mostly). I haven’t seen very many dyno sheets, 1/8, or 1/4 slips between manifolds and headers for a comparison.


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Yea man I know test pipes on like 350z don't give as much as longtubes but maybe our cars are different? I honestly don't know other than on my truck my old setup was short tube headers and cat deleted then I switched to longtubes and picked up power. I really wish I had fu money to just buy both and dyno

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[hunter_killer]

Yea man I know test pipes on like 350z don't give as much as longtubes but maybe our cars are different? I honestly don't know other than on my truck my old setup was short tube headers and cat deleted then I switched to longtubes and picked up power. I really wish I had fu money to just buy both and dyno

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I’d have to guess headers will help get more exhaust out of the chamber as well which would help with more heat escaping the engine overall but without a flow bench test it’s speculation. Especially with the new and bigger blowers coming out for this platform I think headers will really shine over test pipes.
Yeah having the money to do so would be great lol

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[sage0607]

I’d have to guess headers will help get more exhaust out of the chamber as well which would help with more heat escaping the engine overall but without a flow bench test it’s speculation. Especially with the new and bigger blowers coming out for this platform I think headers will really shine over test pipes.
Yeah having the money to do so would be great lol

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Are they making new blower for it? Thats news to me and its very good news lol

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[hunter_killer]

Are they making new blower for it? Thats news to me and its very good news lol

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Yeah at least two are for sure, Merc Racing and another company from Michigan is (the name escapes me right now). While having a new and much better blower will be great hopefully the additional fueling upgrades coming will make the blowers worth it. So that begs the question now about stock manifolds moving enough exhaust out or if they’ll be a choke point for those with a bigger blower.


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[sage0607]

Yeah at least two are for sure, Merc Racing and another company from Michigan is (the name escapes me right now). While having a new and much better blower will be great hopefully the additional fueling upgrades coming will make the blowers worth it. So that begs the question now about stock manifolds moving enough exhaust out or if they’ll be a choke point for those with a bigger blower.


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I feel like if they are designing a blower they are designing it A either considering the stock manifold so it will work well with it or b include a separate manifold which is unlikely but im excited to see

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[RoofRails]

Interesting! I would have though with the longer piping the scavenging would be better for some more power

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I just don't think exhaust flow is as critical on a Supercharged engine as it is on a turbo or normally aspirated unit. The cats are the low hanging fruit. Once they're gone you're not going to do much better as far as HP gains. As far as sound goes I'm sure the header sound clips I have heard still had all the drone / rasp preventing tricks behind them but the sound is absolutely unique and in my opinion sounds very exotic.

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[sage0607]

I just don't think exhaust flow is as critical on a Supercharged engine as it is on a turbo or normally aspirated unit. The cats are the low hanging fruit. Once they're gone you're not going to do much better as far as HP gains. As far as sound goes I'm sure the header sound clips I have heard still had all the drone / rasp preventing tricks behind them but the sound is absolutely unique and in my opinion sounds very exotic.

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Sorry for replying so long after but looks to be that redstar did a dyno of headers vs test pipes and headers did indeed pick up a little power. Not much but for me its worth it because I'm basically making my car max effort

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[somedude]

I have never come across a post or video that was conclusive on the before and after results of headers on the 3.0T engine. I own a shop have a hub dyno, and have a fabricator. If anybody wanted to have a beautiful set of headers custom made and had a very healthy car that I could do before and after runs on it would be very interesting to see the results. The issue I come across is that it is a expensive job to not only install and fabricate the headers, and proper heat shielding. I have not come across a customer willing to put in the money without knowing the gains which I completely understand. Once I complete my shop 2018 RS3 and 2013 RS5 cars and sell them I will move on to a goof ball project and after that A 3.0T build series will happen, but probably not until the end of the year. The planning on it will involve 3 identical B8 S4's. This build project is going to cost me a small fortune.

[sage0607]

I have never come across a post or video that was conclusive on the before and after results of headers on the 3.0T engine. I own a shop have a hub dyno, and have a fabricator. If anybody wanted to have a beautiful set of headers custom made and had a very healthy car that I could do before and after runs on it would be very interesting to see the results. The issue I come across is that it is a expensive job to not only install and fabricate the headers, and proper heat shielding. I have not come across a customer willing to put in the money without knowing the gains which I completely understand. Once I complete my shop 2018 RS3 and 2013 RS5 cars and sell them I will move on to a goof ball project and after that A 3.0T build series will happen, but probably not until the end of the year. The planning on it will involve 3 identical B8 S4's. This build project is going to cost me a small fortune.

Yea I mean I personally trust what redstar says plus headers add horsepower on literally every other supercharged platform on the planet so why wouldn't it work on our you know what I mean? Here's the video in the description they explain the gains of headers vs test pipes. 21wheel gain over high flow catted test pipes so I imagine around 15 ish more wheel than catless test pipes? They say typical test pipes are worth 10-15hp gain over stock cats and the headers are 30-35 estimated based off the info they got. There's a lot of people on this platform that seem to say headers don't add power over test pipes but that just simply doesn't make sense to me headers work by exhaust scavenging and improved flow our engine is no exception to this rule supercharged or not. Look at ctsv, terminators, hellcats, zl1, z06, e55 amg, gt500s they pick up good power from headers especially when already modded. But its just my 2 cents lmk what you think bro! https://youtube.com/shorts/YM3eNNevlRY?feature=share

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[sage0607]

I have never come across a post or video that was conclusive on the before and after results of headers on the 3.0T engine. I own a shop have a hub dyno, and have a fabricator. If anybody wanted to have a beautiful set of headers custom made and had a very healthy car that I could do before and after runs on it would be very interesting to see the results. The issue I come across is that it is a expensive job to not only install and fabricate the headers, and proper heat shielding. I have not come across a customer willing to put in the money without knowing the gains which I completely understand. Once I complete my shop 2018 RS3 and 2013 RS5 cars and sell them I will move on to a goof ball project and after that A 3.0T build series will happen, but probably not until the end of the year. The planning on it will involve 3 identical B8 S4's. This build project is going to cost me a small fortune.

Oh another thing to mention is these guys are dual pulley on 93 I'd imagine people in e40 with ported blowers and aggressive pulley ratio such as myself would likely see more gains from it. Also looking forward to your build series bro

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[rs6aavant]

I have a quick question that you may be able to answer, Unfortunately, after about 200K miles the resonator on the driver side of my 2014B8.5 S4 has something loose inside and I will need to replace it with stock or upgrade. My S4 is fully stock and I would not mind a slight more growl to me exhaust but nothing radical to wake the neighbors up just because, I started the motor. I also do not want a CEL because of the extra air flow so I thought about this from ECS Tuning: https://www.ecstuning.com/b-ecs-part.../012616la01kt/ I called ECS Tuning and they say this setup does not drone either. I hope not. Anyway my question is this. other than the hand tools combinations that could be used to take off the nuts on the stock down pipes have you used or had and of your mechanics use this tool from ECS Tuning and did it make taking off the stock DP's easier. https://www.ecstuning.com/b-ecs-part...ol/012622la01/ Any advise that you may have seem or know would be much appreciated as I am going to attempt this in my garage with ramps and a jack stand or 2.

[sage0607]

I have a quick question that you may be able to answer, Unfortunately, after about 200K miles the resonator on the driver side of my 2014B8.5 S4 has something loose inside and I will need to replace it with stock or upgrade. My S4 is fully stock and I would not mind a slight more growl to me exhaust but nothing radical to wake the neighbors up just because, I started the motor. I also do not want a CEL because of the extra air flow so I thought about this from ECS Tuning: https://www.ecstuning.com/b-ecs-part.../012616la01kt/ I called ECS Tuning and they say this setup does not drone either. I hope not. Anyway my question is this. other than the hand tools combinations that could be used to take off the nuts on the stock down pipes have you used or had and of your mechanics use this tool from ECS Tuning and did it make taking off the stock DP's easier. https://www.ecstuning.com/b-ecs-part...ol/012622la01/ Any advise that you may have seem or know would be much appreciated as I am going to attempt this in my garage with ramps and a jack stand or 2.

Honestly I'm not 100% sure about tools or installing the exhaust on these cars. I will however tell you if you go to an exhaust shop you can get an exhaust done for cheaper. On these cars a good simple exhaust would be muffler delete and some sort of resonator such as a vibrant resonators. If you want it to be quiet maybe even putting a different muffler of your choice on would be better suited to you. Exhaust shops are cheaper than buying a name brand catback

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[ThoseRings]

If you are still dealing with yo it resonator , I just ordered some JhM downpipes and wouldn’t mind giving you my old resonators if you pay shipping

What?