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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 > COmpletely catless to stock muffler



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      09-10-2011, 01:49 AM   #1
az335idesi
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COmpletely catless to stock muffler

anybody have this? any videos? i have done this, and i think it sounds great, but others say it doesnt sound too good..what are your guys opinions..i want to know what others think, that have done this! would love a video to compare with mine! i dont have video right now
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      09-10-2011, 01:57 AM   #2
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It might sound raspy and it will definitely smell bad.
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      09-10-2011, 01:59 AM   #3
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There are many that run catless DPs and stock exhaust..it kicks up the sound and performance..but for best results go full catless...FTW..im prolly gonna die sooner b/c of the fumes..but I love it..
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      09-10-2011, 12:32 PM   #4
az335idesi
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i dont care about smell, only performance and somewhat of sound lol..like if im only getting 2hp out of 2nd cats but sounds like sh**, then i might as well slap them back on
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      09-10-2011, 01:09 PM   #5
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I heard a car with ur catless dp and ae catless exhaust so basicaly the same thing as u would have but with ae mufflers instead of oem( but of coirse the ae is a full exhaust) and it sounded great im sure yours will sound good too.
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      09-10-2011, 01:18 PM   #6
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Quote:
Originally Posted by tibra1 View Post
There are many that run catless DPs and stock exhaust..it kicks up the sound and performance..but for best results go full catless...FTW..im prolly gonna die sooner b/c of the fumes..but I love it..
I cant wait for some catless DP's. Then im full catless and im gonna run 100 octane and suck fumes baby.
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      09-10-2011, 03:57 PM   #7
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tibra1 - do you have any vids??? i want to hear!
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      09-10-2011, 04:48 PM   #8
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Quote:
Originally Posted by az335idesi View Post
tibra1 - do you have any vids??? i want to hear!
I dont have any personal videos..but if you listen here..this is spot on what my setup sounds like..I cant decide which I like more the turbo spool up sound you hear w DPs...or the exhaust note out of the AEs..

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      09-10-2011, 07:19 PM   #9
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but thats an after market exhaust =/..i want to hear the stock muffler completely catless.
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      09-10-2011, 07:30 PM   #10
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Quote:
Originally Posted by tibra1 View Post
There are many that run catless DPs and stock exhaust..it kicks up the sound and performance..but for best results go full catless...FTW..im prolly gonna die sooner b/c of the fumes..but I love it..
Probably worth 8-10 whp at the higher boost levels and some weight reduction going fully catless vs dp+stock exhaust.

I am hell bent on not having to hear exhaust on my 8am commute upstate every day. If 10 whp beats me in a race, god bless you.
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      09-10-2011, 10:10 PM   #11
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Quote:
Originally Posted by themyst View Post
Probably worth 8-10 whp at the higher boost levels and some weight reduction going fully catless vs dp+stock exhaust.

I am hell bent on not having to hear exhaust on my 8am commute upstate every day. If 10 whp beats me in a race, god bless you.
True.the I am def not one for an overbearing exhaust..dp w stock exhaust gives a nice compromise and opens the restriction on the turbos.
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      09-10-2011, 10:11 PM   #12
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Quote:
Originally Posted by az335idesi View Post
but thats an after market exhaust =/..i want to hear the stock muffler completely catless.
I think if you search on you tube you will def find some..
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      09-11-2011, 12:28 AM   #13
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I have heard catless downpipes + secondary cat delete with stock mufflers and it sounds pretty good. But it actually droned a bit more than expected and wasn't that great. Then he switched to the BMW Performance Exhaust and it still drones but sounds way better under throttle.
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      09-11-2011, 01:02 AM   #14
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hes mines, stock exhaust with AR dp, full catless
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      09-11-2011, 01:05 AM   #15
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Add 2 vibrint resonators and you should be golden!!
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      09-11-2011, 01:20 AM   #16
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Edit: Actually I think in these vids they still have catted midpipes tho
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      09-11-2011, 11:41 AM   #17
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Quote:
Originally Posted by tibra1 View Post
I think if you search on you tube you will def find some..
If you hear my car from the inside, it is pleasantly quiet. I don't think the E92 has a resonator like the E90 has. On my 135i which did not have the resonator, the Dp+stock exhaust combo did drone somewhat but still not terrible by any means.
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      09-11-2011, 01:27 PM   #18
az335idesi
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shock- i love it! its got a nice rasp, not and not a fart..sound great!
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      09-11-2011, 03:06 PM   #19
az335idesi
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oh ya, shock: is that with res delete as well?
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      09-11-2011, 05:09 PM   #20
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don't do it. i went fully catless with the stock muffler on my car and it sounds really bad especially between 1500-2000rpm.

does anyone know if getting different mufflers will get rid of the raspiness?
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      09-11-2011, 06:47 PM   #21
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I still got my stock mufflers, e92 doesn't have a resonator I believe.


Quote:
Originally Posted by az335idesi View Post
oh ya, shock: is that with res delete as well?
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      09-11-2011, 09:26 PM   #22
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Yes add 2 vibrints in place of the cats and Bam no more rasp ,just nice deep and throaty!
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