cat removal
Race Director
Joined: Sep 2004
Posts: 13,793
Likes: 0
From: St. Peters MO Sometimes you have to prove yourself by doing alot of killing or alot of dying...
What year car? what motor? Any other mods? If it is an L98 car, removing the 2 precats is beneficial, but removing the main cat, or cats on the LTx motors is a waste of time. They can flow well enough to have over 400hp run thru them without any hinderance. All you are going to do by removing your cats is add pollution to our ozone and make your car louder
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
Originally Posted by kwik_ta
What year car? what motor? Any other mods? If it is an L98 car, removing the 2 precats is beneficial, but removing the main cat, or cats on the LTx motors is a waste of time. They can flow well enough to have over 400hp run thru them without any hinderance. All you are going to do by removing your cats is add pollution to our ozone and make your car louder
I cannot agree more with what kwik_ta just said.
I don't really care if you have no emissions tests, its all about doing the right thing... and leaving cats on is doing the right thing. It's that simple.
As for loss of power? Expect the LTx cats to cost no more then 5hp. Wow. A lot...
Elite Torch Red Member
Joined: Sep 1999
Posts: 57,805
Likes: 23
From: Exit 89 GSP,Lakewood,NJ The Land Of Mojo
Cental/South NJ Events Coordinator
CI 1-2-3-4-5-6-7-8-9-10-11-12 Vet
CI-II Burnout & Drag Champ
St. Jude Donor '03-'04-'05-'06-'07
He has an '87.
Tom, I recommend getting headers, that kind of solves the precat problem.
Tommy's friend has a Random Tech cat on his '89 with LT headers and has no problems.
Tom, I recommend getting headers, that kind of solves the precat problem.
Tommy's friend has a Random Tech cat on his '89 with LT headers and has no problems.
Melting Slicks
Joined: Jan 2002
Posts: 2,531
Likes: 35
From: Lecanto Florida
I replaced the pre-cats with a new larger "Y" pipe without the cats. I still have the OEM CAT in the middle. It is a little louder (not very much) and it's probably just my imagination (or wishful thinking) but it seems to have a little more get-up-n-go from a standing start.
Team Owner
Joined: Sep 2001
Posts: 62,145
Likes: 1,730
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Ok, just remove the front Y-pipe and manifolds and add headers.
The front cats are useless after the engine is hot, if the main cat is in good condition.
The front cats are useless after the engine is hot, if the main cat is in good condition.
