whos cares about being legal 
Exhaust Question?
Thread Starter
Racer
Joined: Jul 2008
Posts: 354
Likes: 0
From: Queensbury NY
Exhaust Question?
I know this is very noobish but I need to know quick and I couldn't find anything in the search.
I have a 99 FRC and I want to eliminate the cats. What is the exhaust diameter on this car stock? Thanks!
I have a 99 FRC and I want to eliminate the cats. What is the exhaust diameter on this car stock? Thanks!
Tech Contributor
Joined: Jan 2007
Posts: 19,456
Likes: 1,164
From: Dyer, IN
Le Mans Master
Joined: Feb 2002
Posts: 6,937
Likes: 21
From: Waldorf MD
Does NY have an emissions check? After removing your cats, you will get a "check engine light" and fail an emissions exhaust or computer check. It could be expensive for you to replace these cats.
Burning Brakes
Joined: Jan 2009
Posts: 1,208
Likes: 0
From: Newport Beach California
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Pro
Joined: Aug 2004
Posts: 575
Likes: 0
From: Richmond Hill Ontario
Setting aside the legality of removing the cats and having to pass emissions tests what do you really think you'll gain by removing them? Why not replace the stock cats with a set of hi-flow ones? They flow well and have a neglible impact on performance, plus you'll pass emissions and won't have to put up with the stink of not having cats. There's no real benefit in totally removing your cats for a street use car and anyone that says different doesn't know what they're talking about......but if you want to learn the hard way, go ahead.
Le Mans Master
Joined: Dec 2005
Posts: 8,575
Likes: 961
From: Communist Colorado
Dont do it. It smells very rich and the popping on decel makes your high performance sports car sound like an old dump truck 
Seriously, the gains are not worth effort. I just this week, took off the set up you want in favor of headers, hi-flow cats and an x pipe.
Seriously, the gains are not worth effort. I just this week, took off the set up you want in favor of headers, hi-flow cats and an x pipe.
Thread Starter
Racer
Joined: Jul 2008
Posts: 354
Likes: 0
From: Queensbury NY
But at the same time some of you reinforced my decision not to do it because why mess with the stock exhaust anyway when I am planning on replacing it anyway. No point.
Le Mans Master
Joined: May 2006
Posts: 5,987
Likes: 18
From: DuBois PA
St. Jude Donor '11-'12-'13-'14-'15
I cut the CATs off my stock 99 exhaust to sell em and the upstream piping was double walled. the inner pipe was 2.5" and the outer pipe was 2.75" I THINK, I didn't measure em but I was thinking it would be a PITA to just replace the CATs with this setup... You'd have to cut the outer wall back far enough to weld the inner pipe to the new exhaust. Not to mention the bend.
Drifting
Joined: Jan 2007
Posts: 1,870
Likes: 38
From: Sacramento CA
This might be a little bit of topic but since we are talking about eliminating components on the exhaust.
Do i need to lower the rear cradle to remove the stock exhaust system? I don't want to cut it and from the looks of it the piping wont be able to be pulled out without lower the rear cradle. Any input on this would be greatly appreciated. Thanks
Do i need to lower the rear cradle to remove the stock exhaust system? I don't want to cut it and from the looks of it the piping wont be able to be pulled out without lower the rear cradle. Any input on this would be greatly appreciated. Thanks
