Want to add Cats, will it affect my tune much?
10-12-2008, 08:09 AM
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Want to add Cats, will it affect my tune much? I just had my car tuned but I'm having a problem with the police. They know it doesn't have cats on it, so they are busting me anytime they c me on the street. I want to put cats back on, how bad will this affect my tune.
10-13-2008, 11:50 AM
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will probably hurt your power levels. I would get the cats that are *cough "empty" *cough and just have the shells 
that is if you can
you will probably have to re-tune just to be safe, but your AFR levels and spark shouldn't matter
that is if you canyou will probably have to re-tune just to be safe, but your AFR levels and spark shouldn't matter
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10-13-2008, 01:07 PM
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10-18-2008, 08:49 AM
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VA state laws says they have to be on the car if it came from the factory with them. Matter of fact I can't even convert to dual exhaust even with the cats because of the communist laws,...opps commonwealth's laws.
10-18-2008, 09:10 AM
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I put the Magna Flow cats on mine and didn't really lose any power or change the tune any. Your O2 sensors are before the cats so it won't scew the tune. They flow great and you will like the way they get rid of the raw fuel smell.
10-19-2008, 11:14 AM
#13
Come on dude, I lived in Roanoke for 24 years. How did they find out? I never once had anyone pop their head under my ride to see if it had cats. You must have some seriously loud exhaust, which they will pull you over for in Salem. But my car was cammed, LT's, ORY, and dumped exhaust and I drove it EVERYDAY all the way from Radford to the Advance Auto Parts in Salem and never once had an issue from the sound police. It probably doesnt help that your car isnt easily forgotten, lol. I'd imagine that a cop would pull you over just to get a better look at that paint job. 
