cat removal

joelh86 · 07-20-2010, 05:48 PM

Hi I was wondering if anyone tried just removing the 2nd cat and nothing else.
I was wondering if there was a sound difference and how much of a difference it is comparing to other things and if there was a sound clip for it.
Its for a 328 coupe. Thanks!

c_jeong89 · 07-20-2010, 08:25 PM

i am 99% sure no one has done this. Usually people just delete them for sound purposes in addition to an aftermarket exhaust. Even then most people that drive a 325/28/30 usually go only as far as to delete the resonator and that is enough.

jfisher160 · 07-20-2010, 08:39 PM

I think when Craven did his headers, he put the secondary cats back on and took the primary off. And with no exhaust his car was loud as fuck. But he just came up with his own Muffler and his car is really quiet so I would maybe ask him about it.

07-20-2010, 05:48 PM	#1
joelh86 Enlisted Member 2 Rep 30 Posts Drives: BMW e92 328i Join Date: Sep 2009 Location: vancouver iTrader: (3)	cat removal Hi I was wondering if anyone tried just removing the 2nd cat and nothing else. I was wondering if there was a sound difference and how much of a difference it is comparing to other things and if there was a sound clip for it. Its for a 328 coupe. Thanks!
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07-20-2010, 08:25 PM	#2
c_jeong89 Banned 85 Rep 2,097 Posts Drives: E90 TiAg Join Date: Feb 2009 Location: Irvine/Bay Area iTrader: (16)	i am 99% sure no one has done this. Usually people just delete them for sound purposes in addition to an aftermarket exhaust. Even then most people that drive a 325/28/30 usually go only as far as to delete the resonator and that is enough.
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07-20-2010, 08:39 PM	#3
jfisher160 First Lieutenant 19 Rep 331 Posts Drives: 2012 335is Coupe Join Date: Jun 2010 Location: Thousand Oaks, CA iTrader: (3)	I think when Craven did his headers, he put the secondary cats back on and took the primary off. And with no exhaust his car was loud as fuck. But he just came up with his own Muffler and his car is really quiet so I would maybe ask him about it. __________________ New - 2013 - 320i - 15% Tint - Future Mods ( BMS Tune, Suspension, Wheels, Exhaust) Sold - 2007 328i (3-Stage Manifold - BMW Perf Intake w/Scoops - Powerbox - Magnaflow Exhaust - MMW Headers - KW Street Comfort - VMR 701s 19' w/M3 offset - BMW Strut Brace - 330I Brake Conversation - 5% Tint All Around - 8K HID Fog Lights -Angel Eyes)
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