Alternatives the the magnaflow 11385/6

[Morritse]

This muffler does wonders for our rasp problems after going catless, but seems to fail after not a great period of time. Are there any other alternatives out there that have had good results?

[KRp220]

borla pro XS
solo performance stl 51

[theweebabyseamus]

The Borla isn't an X-pipe, which is the main reason for using the 11385/6. I can't check the Polo site at the moment.

[kelseysautobody]

The Borla isn't an X-pipe, which is the main reason for using the 11385/6. I can't check the Polo site at the moment.

I just asked this in another thread. It is.

https://www.audizine.com/forum/showt...1#post13625537

[KRp220]

^^ correct. the borla is an X pipe
the STL 51 is not, but still worked fairly well

[theweebabyseamus]

I stand corrected. I wonder if the Borla would be any better about not blowing out on catless cars since it has packing also?

[kelseysautobody]

I stand corrected. I wonder if the Borla would be any better about not blowing out on catless cars since it has packing also?

Curious about this as well. I have the dual 11385 to stock muffler set up and my front is completely hollow sounding. I never saw any signs of muffler packing blowing out my exhaust though. If I ever remove it from the system I'll open up the case to see what happened.

[KRp220]

with the MF and the ECS resonator, i noticed packing material in my exhaust tips pretty quickly. there has been none so far with the Borla, but i think i need a little more time to drive it hard and confirm

[theweebabyseamus]

with the MF and the ECS resonator, i noticed packing material in my exhaust tips pretty quickly. there has been none so far with the Borla, but i think i need a little more time to drive it hard and confirm

How would you describe the difference in sound between the two?

[EAFLO88]

Anyone have a link for the borla in a 2.25”? I’ve gone through 3 MF 11385’s and I really hope there’s something better out there.

[theweebabyseamus]

Anyone have a link for the borla in a 2.25”? I’ve gone through 3 MF 11385’s and I really hope there’s something better out there.

https://www.borla.com/products/proxs...t__400287.html

I'm going to relocate my MF (or a new Borla) to the center res area to hopefully see lower EGTs in that position.

[mys4.org]

Has anyone actually talked with Magnaflow to see why this is happening? I understand there is more flow with no cats, but it seems crazy that it is causing the material to blow out.

[Morritse]

Has anyone actually talked with Magnaflow to see why this is happening? I understand there is more flow with no cats, but it seems crazy that it is causing the material to blow out.

Would think that's it's the heat.

[btb.tyler09]

What about one of these?
https://www.summitracing.com/search/...erforated-tube
I can't find any info about the Acoustic treatment used in the Magnaflows, but the continuous filament fiberglass stuff should be impervious to fiber blowout and handle something like 700-800 degrees C.

[mys4.org]

Would think that's it's the heat.

But it's not like cats absorb heat... This just seems really odd.

[Jk79]

I had the Magnaflow 11385 in place of the mini resonators when I tried the center res delete/x pipe and it started to disintegrate after about 5 months. That was with stock cats and downpipes.

[Morritse]

But it's not like cats absorb heat... This just seems really odd.

What you mean by absorb heat? Everything in the exhaust system gets hot. Cats blow because of constant heat cycling

[theweebabyseamus]

What about one of these?
https://www.summitracing.com/search/...erforated-tube
I can't find any info about the Acoustic treatment used in the Magnaflows, but the continuous filament fiberglass stuff should be impervious to fiber blowout and handle something like 700-800 degrees C.

I haven't been in the world for a long time, but when I used to be into Mustangs they ran Dynomax often. IIRC they did change tone over time but cant say if it was in fact from blowout.

[btb.tyler09]

I haven't been in the world for a long time, but when I used to be into Mustangs they ran Dynomax often. IIRC they did change tone over time but cant say if it was in fact from blowout.

I don't know a whole lot about exhausts, but I've been looking into using this fiberglass for another application. I think the continuous filament stuff is relatively new, but maybe it's been around longer than i thought.

Anyway a change in tone could be due to many things. Owens corning sells this material for a variety of installation methods. One example is filling plastic bags or wax molds that melt away once the muffler goes through a few heat cycles. That could explain the tone change after that melts. Longer term changes could be due to settling of the fill material over time or even contamination of the fill material from soot and stuff in the exhaust gasses.

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[theweebabyseamus]

I don't know a whole lot about exhausts, but I've been looking into using this fiberglass for another application. I think the continuous filament stuff is relatively new, but maybe it's been around longer than i thought.

Anyway a change in tone could be due to many things. Owens corning sells this material for a variety of installation methods. One example is filling plastic bags or wax molds that melt away once the muffler goes through a few heat cycles. That could explain the tone change after that melts. Longer term changes could be due to settling of the fill material over time or even contamination of the fill material from soot and stuff in the exhaust gasses.

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So you think it should hold up better than the MF?

[mys4.org]

What you mean by absorb heat? Everything in the exhaust system gets hot. Cats blow because of constant heat cycling

I'm talking about why the magnaflows are blowing out not the cats.

I'm running them and I've had zero issues. The only difference is I'm still running the stock cats. So I'm trying to figure out why the magnaflows are blowing out for some reason.

[btb.tyler09]

So you think it should hold up better than the MF?

I am inclined to say yes, but i don't know the full details of what's in the magnaflows. Many different factors can cause fiber blowout: perforate size, fill material, exhaust velocity, etc.. It's hard to say what could cause it. One thing you could do is bump the diamter up through the x-pipe to lower flow velocity. May be worth a shot of there is room to work with.

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[midnitemass]

if we plan to keep our cats, is the 11385 the way to go? does it hold up? and should the baby resonators be deleted, or is this just a preference?

[ArgCarp83]

Has anyone tried the borla x pipe instead of the magnaflow one?
Amazon has them on sale right now @ 130 shipped.

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[hardfive]

Has anyone tried the borla x pipe instead of the magnaflow one?
Amazon has them on sale right now @ 130 shipped.

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Link? Dont see them on Amazon @ 130

[ArgCarp83]

Borla 400287 Turbo XL Muffler https://www.amazon.com/dp/B003D4TEAW..._zeRcEb1GM7V1D

Link? Dont see them on Amazon @ 130

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[ArgCarp83]

Anyone?
OP I messaged you but didnt hear back, curious on which way you ended up going.

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[FrankyH]

Would like some feedback on the Borla as well.

[KRp220]

Anyone?
OP I messaged you but didnt hear back, curious on which way you ended up going.

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Would like some feedback on the Borla as well.

i have. i didn't have it for very long because i didn;t like the rest of the setup, but if i were to do everything over again it would be test pipes, downpipes with the borla pro xs, AWE touring
much better build quality from what i could tell and and was told by borla that the packing material was superior to the MF's. my MF blew out fairly quickly and i didn't have any issue with the borla while i had it.

[jparedes]

Me to Borla: "I am interested in purchasing a ProXS™ 2.5" Dual/2.5" Dual 19"x4"x9.5" Muffler part # 400286. I am comparing to Magnaflow 11386. Specifically I want to compare the internal packing material and its heat resistance. I will be installing this in my down pipes with very high EGT's and have been told that the Magnaflows will only last around 6 months before the packing material is destroyed. I am not sure whether its the high EGTs, rich gas mixture, high flow rate or all of the above. People have measured temperatures up to 2000 deg F in the catalytic converters just upstream so I'm assuming they can be just a little cooler in the down pipes. I heard that your Borla packing material is more metallic than Magnaflow's (fiberglass?) material so it might last longer. Can you give me any information on the material type and maybe its tested temp specifications?"

Response: "You should be using a racing muffler instead of this ProXS you have named. Try our XR-1 line, and you will have much longer life out of your mufflers.

https://www.borla.com/products/xr1.html


Thank you,
Ryan Baker
Borla Performance Industries
Direct: (805) 246-6073"

[KRp220]

Me to Borla: "I am interested in purchasing a ProXS™ 2.5" Dual/2.5" Dual 19"x4"x9.5" Muffler part # 400286. I am comparing to Magnaflow 11386. Specifically I want to compare the internal packing material and its heat resistance. I will be installing this in my down pipes with very high EGT's and have been told that the Magnaflows will only last around 6 months before the packing material is destroyed. I am not sure whether its the high EGTs, rich gas mixture, high flow rate or all of the above. People have measured temperatures up to 2000 deg F in the catalytic converters just upstream so I'm assuming they can be just a little cooler in the down pipes. I heard that your Borla packing material is more metallic than Magnaflow's (fiberglass?) material so it might last longer. Can you give me any information on the material type and maybe its tested temp specifications?"

Response: "You should be using a racing muffler instead of this ProXS you have named. Try our XR-1 line, and you will have much longer life out of your mufflers.

https://www.borla.com/products/xr1.html


Thank you,
Ryan Baker
Borla Performance Industries
Direct: (805) 246-6073"

good insight, but there are no dual in/dual out options and they are no x pipe configurations

[jparedes]

Yeah I noticed that as well so wondered if that wouldn’t really help as much with the rasp and drone. If it’s just straight thru bullet design then of course it’ll last longer. You’re not having exhaust ramming into the surfaces and packing material head on before it turns left or right.

[XxSullyxX123]

Yeah I noticed that as well so wondered if that wouldn’t really help as much with the rasp and drone. If it’s just straight thru bullet design then of course it’ll last longer. You’re not having exhaust ramming into the surfaces and packing material head on before it turns left or right.

maybe 2 of these in place of babies and a non-res x pipe right after is a solution? maybe thats why AWE does it that way?

[jparedes]

maybe 2 of these in place of babies and a non-res x pipe right after is a solution? maybe thats why AWE does it that way?

That would be interesting. I already have the non-res x pipe. I already bought the Magnaflow 11386 but I could put that where the big center rez goes. I just don't know if i'll have enough space for 2 cats, 2 borla straight race mufflers and an x-pipe in place of the down-pipe and baby res section. Seems like a lot to stack back to back to back.

[KRp220]

That would be interesting. I already have the non-res x pipe. I already bought the Magnaflow 11386 but I could put that where the big center rez goes. I just don't know if i'll have enough space for 2 cats, 2 borla straight race mufflers and an x-pipe in place of the down-pipe and baby res section. Seems like a lot to stack back to back to back.

what does the rest of your setup look like currently, and ultimately what are you trying to accomplish?

[jparedes]

what does the rest of your setup look like currently, and ultimately what are you trying to accomplish?

Right now it's at the condition that I purchased the car in. It has the baby resonators replaced with either aftermarket bottle style resonators, the center resonator replaced with a non-resonated X-pipe, muffler deletes and 2.5" custom tubing. It's too loud and raspy at WOT for my liking. https://www.youtube.com/watch?v=IkCUg4-jdNk

I purchased 1 Magnaflow 11386 which I intended to put in place of the bottle style resonators where the baby resonators go. I also purchased two Magnaflow 11366's to put at the rear.

My goal is to quiet it down and get the car ready for dual pulley tune. I don't want it stock quiet though otherwise i'd swap someone for all stock. I am going to be gutting the cats instead of getting test pipes. I am thinking of putting two high flow cats at the down pipes. I'm not liking my original thoughts of putting the 11386 right behind the cats because people keep saying they don't last long there. Wondering if maybe I should do what I said earlier and put high flow cats, then a borla x pipe in the down pipe baby res section. Then my magnaflow 11386 in center rez section. Or high flow cats, keep my bottle style rezs, then move my non res x pipe behind them. Then put the magnaflow 11386 in center res. Lots of options. I'll update the forum when i'm done.

[KRp220]

Right now it's at the condition that I purchased the car in. It has the baby resonators replaced with either aftermarket bottle style resonators, the center resonator replaced with a non-resonated X-pipe, muffler deletes and 2.5" custom tubing. It's too loud and raspy at WOT for my liking. https://www.youtube.com/watch?v=IkCUg4-jdNk

I purchased 1 Magnaflow 11386 which I intended to put in place of the bottle style resonators where the baby resonators go. I also purchased two Magnaflow 11366's to put at the rear.

My goal is to quiet it down and get the car ready for dual pulley tune. I don't want it stock quiet though otherwise i'd swap someone for all stock. I am going to be gutting the cats instead of getting test pipes. I am thinking of putting two high flow cats at the down pipes. I'm not liking my original thoughts of putting the 11386 right behind the cats because people keep saying they don't last long there. Wondering if maybe I should do what I said earlier and put high flow cats, then a borla x pipe in the down pipe baby res section. Then my magnaflow 11386 in center rez section. Or high flow cats, keep my bottle style rezs, then move my non res x pipe behind them. Then put the magnaflow 11386 in center res. Lots of options. I'll update the forum when i'm done.

i would start with the Boral Por XS in the downpipes and add HFCs later if you want (just ahead of the front of the reso). once you guy the cats, you'll prob want some rear mufflers. the 11386 is kind of a tough fit where the center res is.
honestly, i'd just ditch the whole rear section and get a used AWE "cat" back, add the borla to the downpipes and call it a day. if i had to do it all over again, thats what i would do. i've been through 10+ setups FWIW

[jparedes]

i would start with the Boral Por XS in the downpipes and add HFCs later if you want (just ahead of the front of the reso). once you guy the cats, you'll prob want some rear mufflers. the 11386 is kind of a tough fit where the center res is.
honestly, i'd just ditch the whole rear section and get a used AWE "cat" back, add the borla to the downpipes and call it a day. if i had to do it all over again, thats what i would do. i've been through 10+ setups FWIW

10+ setups man that's a lot of money haha! Well i've already purchased the three magnaflow items so I feel like I outta use them at this point. At least it'll be a unique setup that we can learn from (maybe a mistake lol). I'll be doing the gutted cats as step number one since i'm getting my subframe and engine mounts replaced in Feb anyway so I figured it was a perfect time. Then I was going to head straight to the muffler shop and have them do all this custom work. I don't know what the AWE "cat" back system runs but all these systems seem so expensive (upwards of $1k). I did lay the Magnaflow in the center res section and noticed that it looked like it would almost not even fit but I saw this guy do it so it seems possible. Maybe my muffler shop will disagree. https://www.youtube.com/watch?v=wgLX4HkFESM

[tommywitaR]

I went with my cats in the xpipe....im a tree hugger....and vibrant resonator real close to the borla muff...it's pretty good...

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[Bordom]

When the Covid blows over and everything goes back to normal, I'm going to be doing a true dual setup on my car. Forget the x-pipe.

Setup:
Catless downpipes - Vibrant 2.5" 1792 Bottle resonators (in place of the baby resonators) - Vibrant 2.5" 1141 Ultra Quiet Resonators (in place of stock center res/x-pipe) - 3" dual tips.

Both pipes will be completely divorced. I've always ran Vibrant products on my cars and they always sound great, with little to no rasp. My 4.2 swapped Allroad has 6 resonators on it, but I may change out the back 18" Res' that were made at a custom shop for a set of Ultra Quiets.