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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Quiet aftermarket exhaust? Do I need Aftermarket exhaust?



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      04-22-2010, 11:41 AM   #1
packinDSS
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Quiet aftermarket exhaust? Do I need Aftermarket exhaust?

I have catless downpipes and high flo-cats with factory stock exhaust........are there real gains in hp/tq if I replace the factory exhaust??? I would also want soemthing quite.......like factory quite......I do not care for exhaust note......just performance. I've read the standard Borla system is the quitest? Can anyone confirm or let me know what they use that is real quite?

I have the follwoing mods:

Catless Down Pipes
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      04-22-2010, 11:45 AM   #2
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I have heard the renn-art is pretty quiet, looking for the same thing myself, hope to hear one in person sometime.
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      04-22-2010, 12:04 PM   #3
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+1 Need something like my stock as well aftermarket to do the quads!
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      04-22-2010, 12:45 PM   #4
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I was looking for the most quiet exhaust for a long time. Went with Milltek. It is really quiet for a completely catless system. However, I fitment issues - front resonators sometimes touch each other and I ger some vibrations @ ~1500-1600 rpm. As far as I know others didn't have such problem.
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      04-22-2010, 01:03 PM   #5
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Quote:
Originally Posted by edo View Post
I was looking for the most quiet exhaust for a long time. Went with Milltek. It is really quiet for a completely catless system. However, I fitment issues - front resonators sometimes touch each other and I ger some vibrations @ ~1500-1600 rpm. As far as I know others didn't have such problem.
Record the sound!I want to hear it!

I've been looking forever trying to find something much like our oem stock mufflers but smaller so I can re-pipe for quad setup. If I could re-use my stock that would be the best!
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      04-22-2010, 01:28 PM   #6
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Go with OEM BMW performance or Remus Sport...
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      04-22-2010, 02:22 PM   #7
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Quote:
Originally Posted by Cal@Jlevi SW View Post
Go with OEM BMW performance or Remus Sport...
I've heard the bmw performance and they are loud. I actually wanted the stock sound levels myself as well. After i started spending money in the exhaust system, i realized that every car seems different. this was my experience.

Started out with stock. (I'm auto)
replaced downpipes with catless and catback with CP-E catback. LOUD!!
Replaced catless DP with CP-E catted dp's. Still LOUD!!!
Had midpipes resonated... STILL LOUD!!!
Replaced axle backs with Bastuck dual's. Decent!

no major drone but throaty. Its very civil when cruising and when you get on it, sounds great. On cold starts though, sounds loud for about 1 minute and then rumbles.
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      04-22-2010, 02:39 PM   #8
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I guess everyone has different opinion in loud. My previous car was a Subaru STI with a APS 3" turboback so my definition of loud is LOUD.

But I am looking for a nice quiet exhaust now.
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      04-22-2010, 02:43 PM   #9
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get a eisenmann made in the most quiet format possible, which is almost as quiet as a standard rear section
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      04-22-2010, 02:49 PM   #10
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Get a BMW performance exhaust, deletes your resonator for a X-pipe, and comes with more high flow mufflers.
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      04-22-2010, 02:53 PM   #11
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Hmm I have catless dp and CPe exhaust=loud and raspy. Installed some resonators in the midpipes and it's perfect. It's not as loud and rasp is totally gone. Again everyone has their own degree of what is considered loud
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      04-22-2010, 02:59 PM   #12
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Quote:
Originally Posted by Jeller View Post
I have heard the renn-art is pretty quiet, looking for the same thing myself, hope to hear one in person sometime.
+1... i personally have the Renn-Art resonated catless exhaust on our shop car with catless DP's and the sound is fairly quiet (the way i like it) It does rip and get louder at WOT tho
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      04-22-2010, 04:12 PM   #13
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I also have the rennart non resonated exhaust on my car and it is def quiet in comparison to others out there.
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      04-22-2010, 05:55 PM   #14
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My CPE was loud as hell after I went with the AR DPs, but adding resonators help calm the earth shattering noise....Now its nice and sporty and deep
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      04-22-2010, 06:57 PM   #15
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try HKS, best bang for the buck exhaust unit IMHO.
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      04-22-2010, 07:22 PM   #16
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Quote:
Originally Posted by NJ65 View Post
try HKS, best bang for the buck exhaust unit IMHO.
+1 HKS is a great company, great product.
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      04-22-2010, 07:24 PM   #17
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Autobahn Exotic exhaust is worth checking out as well. It's a fairly quiet exotic sound but growls when WOT.

Quote:
Originally Posted by NJ65 View Post
try HKS, best bang for the buck exhaust unit IMHO.
I don't think there is such a thing when it comes to exhausts Very minimal gains for a hefty price.
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      04-22-2010, 07:24 PM   #18
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Which one provided absolutely NO sound lol! I'm auto and so i dont want everyone to hear me accelerate! Similar to OEM with 0 sound lol!
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      04-22-2010, 07:28 PM   #19
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Quote:
Originally Posted by Mallard View Post
get a eisenmann made in the most quiet format possible, which is almost as quiet as a standard rear section
no no no.. trust me.. eisenmann is one of the loudest one out there... if you wanna quiet go with Bastuck.. the sound is just amazing
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      04-22-2010, 09:53 PM   #20
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Put a set of Corsa mufflers on it (axle back).Listen to it on Turner motorsports web.
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      04-23-2010, 02:42 AM   #21
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I say you don't, unless you can't live with out that additional 5-10 hp/tq

Just do "golf" mod if you haven't done it.

My current set-up: AR Cat-less DPs + OEM exhaust + "golf" mod + Cyba single layer quad chrome tips. the sound of my exhaust:
- Tamed
- Car sounds euro exotic & classy
- Almost zero drone
- Almost non intrusive inside of the car so you can still talk on blue-tooth hands free
- Can be PRO or CON, wife is NOT whining that sound is obnoxious and you wake up neighborhood during cold-start.

Got more compliments running this set-up vs when I had AE quad DP back system with HFC.
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      04-24-2010, 01:07 PM   #22
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