Bmw Performance Exhaust N55?

[C135]

Hi there,

just wondered if anyone knows if BMW is going to make a performance exhaust for the 2011 135...

[oman135]

i dont think they will make
in bmw web the n54 performance exhaust is listed for n55 as well

[BadM4]

i was told it works for both systems

[cwg]

I have it on my 2011 N55 135i Great sound - claimed 5 hp power bump - cant say on the power one way or another as I got it with only 400 miles on the car during the break in period. Love the way it sounds though

[oman135]

the bmw performance is little louder then the N55 stock exhaust not sure if its worth it.
its better to spend on full exhaust for more power gains and weight savings Berk,cp-e ,madded etc..

[1SerieStud]

Originally Posted by oman135

the bmw performance is little louder then the N55 stock exhaust not sure if its worth it.
its better to spend on full exhaust for more power gains and weight savings Berk,cp-e ,madded etc..

I have to disagree with this statement. It is not "a little louder" than stock, it is actually substantially louder, and the sound is quite intoxicating/amazing - and yes, it is also louder than a stock exhaust with a "golf-tee mod". The only valid part to this statement is the power/weight part. If you want more than 5hp, then sure, go with a full exhaust instead. But so far, I have yet to find an exhaust that sounds better (to my ears) than BMW's performance exhaust.

[cwg]

No cats in the midpipes for the N55 - not sure how much more a full exhaust will help I agree with 1 seriestud the sound truely is intoxicating

[C135]

Well thanks. I'm not going to go with any other manufacturer to avoid voiding the warranty. But I'm very curious about this BMW exhaust, a friend of mine had it one his 125 in Switzerland and it sounded mean, and with a really high pitch top note.
1seriestud, you're in Jacksonville? Is there any chance I could hear yours? Are you going to cars and coffee? Did you get it from Tom Bush? Thanks

[1SerieStud]

Originally Posted by C135

Well thanks. I'm not going to go with any other manufacturer to avoid voiding the warranty. But I'm very curious about this BMW exhaust, a friend of mine had it one his 125 in Switzerland and it sounded mean, and with a really high pitch top note.
1seriestud, you're in Jacksonville? Is there any chance I could hear yours? Are you going to cars and coffee? Did you get it from Tom Bush? Thanks

Yes I'm in jax and you can hear it whenever you want. Shoot me a PM and let me know! I've never gone to cars and coffee.

EDIT: And I forgot to mention, I buy all my stuff at Tom Bush BMW of Orange Park. They have price matched Tischer's prices for me every single time and so far everything I've gotten has been from them. I guess if you "want it now", you can order from the local dealer, otherwise you can get it online.

[1SerieStud]

Originally Posted by cwg

No cats in the midpipes for the N55 - not sure how much more a full exhaust will help I agree with 1 seriestud the sound truely is intoxicating

FWIW - what the n54 has on the midpipes are resonators, not cats. N55's don't have them

[1SerieStud]

OP has officially heard and ridden in a car equipped with the Performance Exhaust as of today. Nice to meet you buddy!

[eleven11]

Originally Posted by 1SerieStud

OP has officially heard and ridden in a car equipped with the Performance Exhaust as of today. Nice to meet you buddy!

+1 to you. About the exhaust: I absolutely love the sound of mine. Anything louder would be too much, imo. It's just right.

[perral1]

Originally Posted by 1SerieStud

FWIW - what the n54 has on the midpipes are resonators, not cats. N55's don't have them

The N54 has cats AND a resonator on the midpipe. The N55 just has a resonator. The BMW performance exhaust deletes the resonator but obviously leaves the cats, in the N54's case.

EDIT: And forgot to add that in my opinion the BMW performance exhaust sounds amazing.

[Babyjoe1973]

Who told you that the N55 as no secondary cats? It has! Check RealOEM. N54 and N55 have the same mid-pipes with resonator and secondary cats!!!

Babyjoe

[collegemt]

Originally Posted by Babyjoe1973

Who told you that the N55 as no secondary cats? It has! Check RealOEM. N54 and N55 have the same mid-pipes with resonator and secondary cats!!!

Babyjoe

I have a 2011 135i with the N55 and I can assure you it has no secondary cats in the mid pipe. I was just under the car last week doing a oil change. It only has a resonator in the midpipe.

[oman135]

There is no cats in tge n55 mid

[1SerieStud]

Originally Posted by Babyjoe1973

Who told you that the N55 as no secondary cats? It has! Check RealOEM. N54 and N55 have the same mid-pipes with resonator and secondary cats!!!

Babyjoe

I am telling you that the n55 has no cats (or extra resonators) on the midpipes. Let me know if you need a picture.

To the n54 guy: from what I've seen/heard, the n54 has the resonator that the n55 has right before the muffler, PLUS resonated midpipes. What you have on the midpipes are not cats but another set of resonators. Also, the cats are found on the downpipes, which we n55 guys only have one.

[perral1]

Originally Posted by 1SerieStud

To the n54 guy: from what I've seen/heard, the n54 has the resonator that the n55 has right before the muffler, PLUS resonated midpipes. What you have on the midpipes are not cats but another set of resonators. Also, the cats are found on the downpipes, which we n55 guys only have one.

I'm not an N54 guy - I've got an N55 - but everything I've ever read or heard says the midpipes have cats on the N54. RealOEM lists them as cats:
http://realoem.com/bmw/showparts.do?...70&hg=18&fg=10

And if you still don't believe me, maybe you'll trust Berk:
http://www.1addicts.com/forums/showp...3&postcount=19

But the N55 definitely does NOT have secondary cats (also in the above post by Berk).

[1SerieStud]

Originally Posted by perral1

I'm not an N54 guy - I've got an N55 - but everything I've ever read or heard says the midpipes have cats on the N54. RealOEM lists them as cats:
http://realoem.com/bmw/showparts.do?...70&hg=18&fg=10

And if you still don't believe me, maybe you'll trust Berk:
http://www.1addicts.com/forums/showp...3&postcount=19

But the N55 definitely does NOT have secondary cats (also in the above post by Berk).

Hey I'm not an N54 guy either....most I know about the N54 I have read (since I can't just slide under the car to see it for myself), so there is a high chance I could have read something erroneous. This being said, I stand corrected.

However, for the sake of this thread, it is important to make sure that everyone is informed about the N55 only having 1 single cat (on the downpipe), one single resonator (right before the muffler and after the midpipes), and absolutely nothing (no resonators or cats) on the midpipes themselves.

[bogart]

Originally Posted by C135

Well thanks. I'm not going to go with any other manufacturer to avoid voiding the warranty. But I'm very curious about this BMW exhaust, a friend of mine had it one his 125 in Switzerland and it sounded mean, and with a really high pitch top note.
1seriestud, you're in Jacksonville? Is there any chance I could hear yours? Are you going to cars and coffee? Did you get it from Tom Bush? Thanks

I have the BMW Performance Exhaust on my '11 135i DCT, and I just bought a new camera, so I was testing out the HD video. Check out the link below. I apologize for the angle and rattling, I have to come up with a better camera mount.

[MarkR171]

Sounds just like stock in your video... I really need to hear one in person to see if it's louder...

[escobar929]

Originally Posted by bogart

I have the BMW Performance Exhaust on my '11 135i DCT, and I just bought a new camera, so I was testing out the HD video. Check out the link below. I apologize for the angle and rattling, I have to come up with a better camera mount.

sounds good but next time, no music, takes away from the exhaust sound