3" exhaust questions? Need advice on cat.
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Joined: Sep 2003
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From: NC
Car: Camaro
Engine: 305
Transmission: 700r4
Axle/Gears: 3.73
3" exhaust questions? Need advice on cat.
My current Flowmaster exhaust got in my way so I chopped it off! It was screwed anyway
so I ordered a 3" replacement Flowmaster cat back setup and next comes the SLP 1 3/4 headers. My question is what aftermarket hi flow cat would you use? Gotta keep it legal but I want to help the flow out? Give me suggestions.
so I ordered a 3" replacement Flowmaster cat back setup and next comes the SLP 1 3/4 headers. My question is what aftermarket hi flow cat would you use? Gotta keep it legal but I want to help the flow out? Give me suggestions. 
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Joined: Feb 2004
Posts: 697
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From: Kalamazoo
Car: 89 iroc
Engine: 355 TPI FINALLY
Transmission: 700r4/ SHIFT KIT
Axle/Gears: 3.42
I don't have one, but I have read a lot of good things about the Catco, you can get it off of e-bay
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Joined: Apr 2004
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From: Denver, CO
Car: cleanest '86 sport coupe around!!
Engine: 355ci twin 66mm turbos on e85
Transmission: built rmvb th400 w/ t-brake
Axle/Gears: 3.23
can't go wrong with catco for the price when compared to the ones from like random technology, SLP etc.
Joined: Mar 2000
Posts: 43,187
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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
Catco 9118 is the least expensive direct-fit I've found. I don't know the number, but a Walker of the same ilk would most likely be the same thing, and may be less expensive than the Catco.
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