removing cats?
Thread Starter
Racer
Joined: Apr 2003
Posts: 286
Likes: 0
From: Ivyland PA
removing cats?
Has anyone removed there stock cats and replaced with straight pipes? I was thinking of doing this with my stock mild to wild exhuast. I want to headers eventually but i am waiting a little while since my wife is going to kill me if i keep spending money like i have been. I figures this might be a quick cheep fix to make my car louder. It is a weekend only car so ispection is not a problem. Track use only.
Melting Slicks
Joined: Mar 2007
Posts: 3,327
Likes: 166
From: Summerton SC
Tech Contributor
Here in South Carolina there are no inspections or emission tests, so we can run straight pipes, no cats, no muffs, no nuttin' ... but tractor-pull sounds ...
Last edited by Thrash; Jul 8, 2011 at 05:47 PM. Reason: typo
Instructor
Joined: Jul 2006
Posts: 233
Likes: 0
From: Redondo Beach CA
There is no performance advantage to removing cats on anything but very high flowing vehicles (i.e. high boost forced induction). The only thing its going to do is spew noxious fumes for no good reason. I honestly can't believe this myth perpetuates with so many people. These are not the crappy catalytic converters that were slapped on cars in the 70s. The stock C6 cats are REALLY GOOD and flow extremely well. I guarantee you'll see less than 1% difference in power in anything but edge cases.
Burning Brakes
Joined: Oct 2003
Posts: 823
Likes: 3
From: Pensacola FL ROLL TIDE !!
St. Jude Donor '15
Exhaust Muffler
This may sound stupid, but I was wondering if anyone has run straight pipes (with cats) from the axle back or if there are any kits to do this?
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Burning Brakes
Joined: Oct 2003
Posts: 823
Likes: 3
From: Pensacola FL ROLL TIDE !!
St. Jude Donor '15
Safety Car
Joined: May 2011
Posts: 3,582
Likes: 46
From: va
aside form the obvious performance gain you can also run racing oil that has higher additive amounts (which are bad for cats but good for your engine), higher octane leaded racing fuel, and more aggressive tuning.
Le Mans Master
Joined: Dec 2004
Posts: 5,492
Likes: 808
From: West coast CA
Running without mufflers is going to be insanely loud. You will **** everyone off and attract the attention of cops everywhere.
