What's better a single high flow cat or a stock dual cat setup??
Joined: Feb 2001
Posts: 13,758
Likes: 560
From: Cincinnati, OH
Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
In the end a single 3" high flow cat will be chaper and be able to support up to 400hp at the wheels with ease. Dual cats are cool but they take up a lot of room and are very expensive.
Supreme Member
Joined: Mar 2003
Posts: 4,771
Likes: 15
From: Florida
Car: 1987 Black IROC-Z (SOLD)
Correct me if I am wrong but the dual cat system still went to a single 3" pipe and single muffler with dual outlets. May be that set up worked for a 5 HP increase, but with the newer 3" Hi-flow cats I don't see any advantage now.
Senior Member
Joined: Feb 2003
Posts: 891
Likes: 0
I have a stock dual cat setup and I'll tell you it's a bitch and a half for cats (expensive), and headers are a pain to deal with since there aren't as many choices that are 50 state legal. Go with a high flowing single 3" cat.
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Supreme Member
Joined: Nov 2001
Posts: 1,160
Likes: 0
From: So. California
Car: 91 Camaro RS
Engine: 305 TBI
Transmission: Pro-Built Automatic/Vigilante 2800
lets say I have a modified engine that's barely smog legal. Would a dual cat set-up increase my chances of passing??
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