No catalyic converter???
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Driver
Joined: Feb 2009
Posts: 136
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From: CA
No catalyic converter???
Has anyone driven a GS4 without a catalyic converter? If so, how noisy is it? If I put a Blitz exhaust system with pre-silencers on it, would it be even louder? Thoughts and suggestions, please.
Rookie
Joined: Apr 2007
Posts: 68
Likes: 0
From: AZ
I am dumb and basically unbolted the exhaust right in front of the third cat sooo basically running nothing after the headers and it was pretty loud a little raspy not bad full throttle the thing was scary but could tell a big difference at low rpm .......in a bad way 
.... Dunno if that helps
.... Dunno if that helps
Last edited by VIPFAMILY; Apr 22, 2009 at 07:13 PM.
search up exhaust...
its called adding an X-pipe to remove the cats. also the cats only filter out the fumes not noise... If you want increase exhaust note you would want to remove the resonators..
its called adding an X-pipe to remove the cats. also the cats only filter out the fumes not noise... If you want increase exhaust note you would want to remove the resonators..
Lexus Test Driver
Joined: Jun 2008
Posts: 1,431
Likes: 0
From: Ca
i removed the resonators in my 91LS and welded some magnaflow tips on.. the sound is stock on idle, but when i give it gas it sounds some what like a stock G35.. not a bad sound at all, but it's no where near after market exhaust loud, if you were to add some a/m exhausts on top of removing the resonators, i'd say it would be pretty loud
if you removed the cat, you probably won't pass your emission test
if you removed the cat, you probably won't pass your emission test
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