Cat interchangeability
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Junior Member
Joined: Sep 2004
Posts: 31
Likes: 0
From: Chilliwack, BC
Car: 87 Camaro SC
Engine: 305 TPI
Transmission: 5-Speed
Cat interchangeability
Hoping someone can help, did a search & couldn't find an answer
Trying to get my car back on the road after swapping in a 305tpi... I need a new cat & found there's a serious price difference between direct fit cats.
A cat for a 305TBI is $135 while a cat for a 305TPI is $295.
Can I use the TBI cat on my TPI motor with out running into problems?
The car has to go thru emissions testing, otherwise I'd ditch the cat
Trying to get my car back on the road after swapping in a 305tpi... I need a new cat & found there's a serious price difference between direct fit cats.
A cat for a 305TBI is $135 while a cat for a 305TPI is $295.
Can I use the TBI cat on my TPI motor with out running into problems?
The car has to go thru emissions testing, otherwise I'd ditch the cat
Joined: Mar 2000
Posts: 43,187
Likes: 43
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Did you swap in the TPI exhaust? If not, then the cheaper cat will work. If you did, get the TPI cat.
The TPI cat is about US$120 from Summit (CTO-9118), not sure what that translates to by the time it reaches your door.
The TPI cat is about US$120 from Summit (CTO-9118), not sure what that translates to by the time it reaches your door.
Last edited by five7kid; Jul 20, 2005 at 09:38 AM.
Thread Starter
Junior Member
Joined: Sep 2004
Posts: 31
Likes: 0
From: Chilliwack, BC
Car: 87 Camaro SC
Engine: 305 TPI
Transmission: 5-Speed
nope didn't swap the exhaust... come to think of it, the cat back system is still the V6 stuff (High Flow I'm sure) :-S. Tho it does have headers.
Maybe I'll just stick to the universal fit cat & patch in the difference
Maybe I'll just stick to the universal fit cat & patch in the difference
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