Which 2-in 2-out muffler are you running? Suggestions for 2 in 2 out mufflers

[rcfanatic]

Here is my setup. 327i, ebay headers, Magnaflow 94008 2-in 2-out cat.

I was planning on getting a Brullen muffler until I recently found out they are discontinued so now I'm on the hunt again.

Almost everyone on this forum says that magnaflow mufflers are too loud, raspy, poor quality, etc. so magnaflow is out. I don't want to spend more than $300. My biggest concern is that it is not too loud or raspy.

So I was thinking either going with the stock muffler or a dynomax. Would a stock muffler negate any benefits of the headers? Almost every thread on here referring to dynomax is on an m42 so I can't really make a judgement there. The one thread I found for an M20 it was 1-in 1-out.

Thanks guys

[nando]

the build quality of magnaflow is fine, it's the sound quality that sucks. :p

dynomax is good, so is borla. the stock muffler is pretty heavy. whats the obsession with dual pipes though? why not single 2.5", cat, and a muffler? lighter and same/better flow.

I feel like the preacher of single pipe exhaust or something. lol. leave that shit for guys with V8's ;)

[rcfanatic]

the build quality of magnaflow is fine, it's the sound quality that sucks. :p

dynomax is good, so is borla. the stock muffler is pretty heavy. whats the obsession with dual pipes though? why not single 2.5", cat, and a muffler? lighter and same/better flow.

I feel like the preacher of single pipe exhaust or something. lol. leave that shit for guys with V8's ;)

I looked all over Borla's website and couldn't find a 2-in 2-out muffler.

The reason I'm sticking with 2 pipes is that the headers come with two downpipes and an x-pipe already, so I bought a 2-in 2-out cat to mate with those. I didn't really see the purpose of running a single pipe just from the cat to the muffler.

[nando]

cut the X in half, make it a Y, and run a single pipe all the way back ;)

[rcfanatic]

cut the X in half, make it a Y, and run a single pipe all the way back ;)

Heh, I might consider that if I had not already spent $100 on the cat ;) But it begs the question, if one pipe is superior why would BMW use two pipes for almost 25 years?

[nando]

ground clearance/looks/marketing

there's no performance benefit to a dual pipe, unless they're larger than the single pipe. single pipes have higher flow for the same cross sectional area, because there is less surface area on the pipe walls.

[Wh33lhop]

The performance advantage goes to single pipes, but I tend to like the sound of duals better than singles. Not sure why.

[nando]

it won't sound any different if there's an X pipe, and there is, in every BMW system.

[rcfanatic]

Well I do have some ground clearance issues with my eta exhaust, and I already bought the cat for two pipes, so...

Who runs a 2-in 2-out muffler and which one is it/how do you like it??

[FredK]

The reason why, IMO, is because no one makes a good sounding single muffler. We're forced to use mufflers meant for circle track cars or 'murrican muscle.

The nice sounding duals (Supersprint and Stromung) are all "tuned" to the tonal characteristics of the car they're meant for.

[nando]

that is true, but they're heavy, and expensive.

I don't think a borla sounds "bad" either..

[rcfanatic]

I don't think a borla sounds "bad" either..

Does Borla make a dual in/out muffler?

[nando]

dunno

https://www.summitracing.com

www.jegs.com

etc.

[E30>???]

i have a supersprint dual in n out i love the way it sounds wot, at idle its u only hear hear a slight rumble.

[rcfanatic]

i have a supersprint dual in n out i love the way it sounds wot, at idle its u only hear hear a slight rumble.

You paid at least $600 for it though right?