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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 > Deleting my secondary cats..



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      12-20-2010, 09:32 PM   #1
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Deleting my secondary cats..

Well i deleted my resonator on my E90, and divorced the piping, no x-pipe, i like the sound, Coupe like loud maybe a bit more. More rumble since there is no x-pipe im guessing down low around idle, sounds good.

Tomrrow i am deleting my secondary cats, just wanted to hear some opinions on sound, will it get much louder or even louder at all?
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      12-20-2010, 09:46 PM   #2
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How much did it cost you to delete the resonator? Im guessing you took it to an exhaust shop? You should post up some pictures!
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      12-20-2010, 11:34 PM   #3
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Your car will sound like Ferrari and gain of 60 + whp kiiiiiiiiiiiiiiiiiid don't forget to install a parachute in the back =DDDD
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      12-20-2010, 11:37 PM   #4
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Secondary cat delete will significantly increase sound, I had it for a while but eventually put them back as it got annoying at times, but thats just me.
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      12-20-2010, 11:54 PM   #5
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Quote:
Originally Posted by Fraggy View Post
Secondary cat delete will significantly increase sound, I had it for a while but eventually put them back as it got annoying at times, but thats just me.
Interesting thanks alot for the feedback. Hope it doesnt get too crazy loud. will post vids and pics tomrow.

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Originally Posted by Iwantm3 View Post
Your car will sound like Ferrari and gain of 60 + whp kiiiiiiiiiiiiiiiiiid don't forget to install a parachute in the back =DDDD
HAHA, im going tomrrow got a sick deal to do it where i deleted my resonator, let me know if u wanna come we go and get it done together!!

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Originally Posted by gbreeE90 View Post
How much did it cost you to delete the resonator? Im guessing you took it to an exhaust shop? You should post up some pictures!
Just my history, i put up a thread with pics and vids. Cost me 100 bucks, took it to a local muffler shop took about one hour. For E90's, its a 100% must do mod... but if you want louder like me, secondary cats are next
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      12-21-2010, 12:30 AM   #6
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Yo what time are you going ? I want to call HPF tomorrow ask them for the price of their 3.5 mufflerless 1st , shit sounds niiiiiiiiice !!!!
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      12-21-2010, 12:33 AM   #7
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Cant wait to hear a vid of the new set up
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      12-21-2010, 12:40 AM   #8
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Quote:
Originally Posted by Iwantm3 View Post
Yo what time are you going ? I want to call HPF tomorrow ask them for the price of their 3.5 mufflerless 1st , shit sounds niiiiiiiiice !!!!
YEa def is nice... i was thinking of late afternoon around 2-3.. Let me know, im sure well get em both done for dirt cheap.

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Originally Posted by iBoost View Post
Cant wait to hear a vid of the new set up
Here is a link to the thread i made with a picture and video of a stock E90 335i exhaust with the resonator delete, and the piping divorced (no xpipe)

http://www.e90post.com/forums/showthread.php?t=446063

Will put up video up tomrrow and pics of new setup
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      12-21-2010, 12:50 AM   #9
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Quote:
Originally Posted by 1LUMI335 View Post
YEa def is nice... i was thinking of late afternoon around 2-3.. Let me know, im sure well get em both done for dirt cheap.



Here is a link to the thread i made with a picture and video of a stock E90 335i exhaust with the resonator delete, and the piping divorced (no xpipe)

http://www.e90post.com/forums/showthread.php?t=446063

Will put up video up tomrrow and pics of new setup
Ite I'll hit you up I'm going to bed tired as fuck bro did so much paper work I was planing on going to sleep 2 Hrs ago lol
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      12-21-2010, 02:40 AM   #10
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YES! thanks for doing this, you will help me decide which route i want to go! post the video asap! i guess the resonator delete wasn't loud enough for you? lool

im thinking removing my secondary cats and resonators in one go and IF it gets too loud, just undo the golf tee mod.
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      12-21-2010, 08:15 AM   #11
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Quote:
Originally Posted by Iwantm3 View Post
Ite I'll hit you up I'm going to bed tired as fuck bro did so much paper work I was planing on going to sleep 2 Hrs ago lol
Nothing like rocking e90post late at nite when your sick or there nothing to do hahaha.

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Originally Posted by gaifaun View Post
YES! thanks for doing this, you will help me decide which route i want to go! post the video asap! i guess the resonator delete wasn't loud enough for you? lool

im thinking removing my secondary cats and resonators in one go and IF it gets too loud, just undo the golf tee mod.
No problem.. Waiting to finish my last Final.. once im done with the test im gonna go get this done.

Well, the resonator delete, made my e90 335i sound like E92 335i at WOT, just a tad bit louder maybe with a slight different tone on partial throttle since i removed the resonator which always acts as a x-pipe and divocred the piping, compared to the e92 aswell which has a small x-pipe, this changes the part throttle sound. That the best way to sum it up since i owned both the E90/e92 335i's.

well see, should be fun
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      12-22-2010, 08:55 AM   #12
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Got em deleted guys... Overall i am very happy with the exhaust setup now!

I am going to make a new thread with a cold start and small rev video, until i have some time later today to do some drive bys.

deleting the cats, didnt make it that much louder to my surprise. The N54 exhaust note is more pronounced tho, that is the only thing i can gather from deleting the cats. But overall the resonator delete and secondary cat delete sound like a bmw performance exhaust.

Its just perfect! sounds expensive, and i am already getting compliments for it. Videos to come soon. I am very picky with my exhaust notes so, and i cant be happier!
'IwantM3' came with me so he can testify to the sound

If i had to do it again, i would of deleted my secondary cats the same time i deleted the resonator! But man, this makes the E90 so much more fun, and the car overall more fun to drive!!!

Last edited by Bagelfast; 12-22-2010 at 09:02 AM..
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      12-22-2010, 09:54 AM   #13
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post videos when you get a chance
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      12-22-2010, 10:14 AM   #14
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It wont be too bad without the secondaries. You shouldnt experiance any drone with factory mufflers.
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