Need Help with Cats!!!
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Senior Member

Joined: Apr 2002
Posts: 531
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From: Northern New Jersey
Car: 91 Firebird Formula
Engine: For me to know.....
Transmission: and you to find out....
Need Help with Cats!!!
I have a 91 Formula and the cats are missing...I bought it that way. I CANT straight pipe it because the cops wouldnt like that. =( Anyway..Could someone tell me a place where I can buy hi flow cats for my car? I have/had 2 cats on my car and from what Ive been reading that was a factory option???? Im also considering redoing the rest of the exhaust (cat back system). But FIRST THINGS FIRST. I need cats... I cant find any place over the internet that can SELL me cats WITHOUT me telling them what size inlet and outlet I need. Can anybody help me???? Thank in advance.
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Joined: Jan 2001
Posts: 7,164
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From: Someone owes me 10,000 posts
Car: 99 Formula
Engine: LS1
Transmission: T56
Axle/Gears: 342
Check www.summitracing.com search for Catco
if you have a 350 you deff want 2 cats...... go to 3rdgenformula.com and look up your year and make and all that.... get ur vin number and it will tell you what kind of motor you have and how many and waht size cats you need
Thread Starter
Senior Member

Joined: Apr 2002
Posts: 531
Likes: 0
From: Northern New Jersey
Car: 91 Firebird Formula
Engine: For me to know.....
Transmission: and you to find out....
This is what CTO-4153 is......
Chevrolet/Pontiac: 1989-91 5.0L (VIN-F), 1989-92 5.7L (VIN-8) Camaro/Firebird, direct fit OEM dual cat y-pipe style, catalytic converter.
In SIMPLE terms does this mean if I bought this I'd get 2 CATS? My major/minor problem with the car is I cant order parts though by the VIN because the car came with a 5.0 in it and now has a 5.7. But where there was a 5.0 or 5.7... CTO-4153 would still be right for either engine right? I thought Catco was supposedly the cheap price for cats??? $270 is cheap?
Well guys thanks your continued help....later
Chevrolet/Pontiac: 1989-91 5.0L (VIN-F), 1989-92 5.7L (VIN-8) Camaro/Firebird, direct fit OEM dual cat y-pipe style, catalytic converter.
In SIMPLE terms does this mean if I bought this I'd get 2 CATS? My major/minor problem with the car is I cant order parts though by the VIN because the car came with a 5.0 in it and now has a 5.7. But where there was a 5.0 or 5.7... CTO-4153 would still be right for either engine right? I thought Catco was supposedly the cheap price for cats??? $270 is cheap?
Well guys thanks your continued help....later
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