Eliminate pre cats?
Thread Starter
Drifting
Joined: Oct 2006
Posts: 1,934
Likes: 3
From: Citrus Heights California
Eliminate pre cats?
I'm looking at this Y-pipe for sale at exotic muscle. Should I get any HP improvement? I have a Carsound high flow cat and catbacks with stock shorty headers.
C1151 STAINLESS STEEL FRONT Y-PIPE
This High Performance. Y-Pipe is designed to fit Corvettes 86-91. Recommended for off-road use only.
$ 195.95 ** APPLICATION: C4 / L98 86-91
http://www.exoticmuscle.com/webpage....CATSEL=EXHAUST
C1151 STAINLESS STEEL FRONT Y-PIPE
This High Performance. Y-Pipe is designed to fit Corvettes 86-91. Recommended for off-road use only.
$ 195.95 ** APPLICATION: C4 / L98 86-91
http://www.exoticmuscle.com/webpage....CATSEL=EXHAUST
Thread Starter
Drifting
Joined: Oct 2006
Posts: 1,934
Likes: 3
From: Citrus Heights California
Got one, a Carsound cat. I heard I can gain about 10 HP. Anybody have any info on this?
Last edited by Kool88vette; Aug 6, 2007 at 01:35 AM.
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
I have always felt that the L98 exhaust was it's biggest problem. The main cat will help.
So will losing the pre-cats. I think all in all, it will add about 20hp. You can now do some work to the intake and get another 10 or 15. It all adds up.
So will losing the pre-cats. I think all in all, it will add about 20hp. You can now do some work to the intake and get another 10 or 15. It all adds up.
Thread Starter
Drifting
Joined: Oct 2006
Posts: 1,934
Likes: 3
From: Citrus Heights California
The ad says nothing about pipe size. Stock is 2 1/4. If the new pipe is 2 1/2 like the rest of the exhaust system I should see some HP improvement. Right?
Thread Starter
Drifting
Joined: Oct 2006
Posts: 1,934
Likes: 3
From: Citrus Heights California
I worked on the intake it has a superram and a 52mm TB.
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Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
Replace with the new part... it's a DIY project.
the exhaust is to restrictive on our vettes, but I'm not sure I'd pay the price their asking.
Race Director
Joined: Jun 2004
Posts: 13,952
Likes: 706
From: WI
$200 is way to much for that IMO. I would cut them off and use expanded end pipes with clamps, in the cats place. Or cut them off and have a shop weld pipe in. Either of witch would save money. And be less work since you don't have to try and remove the bolts from the manifolds.
Le Mans Master
Joined: Jun 2006
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From: One day you're a Comet...the next day you're dust... Arkansas
Thread Starter
Drifting
Joined: Oct 2006
Posts: 1,934
Likes: 3
From: Citrus Heights California
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
It is illegal... they are just useless bits of added weight.
Get the new pipe and DIY. Check Performance Peddler, too.
Le Mans Master
Joined: Feb 2006
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From: Louisiana