3 inch tpi cat
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Joined: Sep 2001
Posts: 1,195
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From: Flowery Branch, GA
Car: 1985 Iroc-Z
Engine: 1 BA 305 TPI
Transmission: Probuilt 700R4 - 2800 Stall Midwest
Axle/Gears: 3.42
I have the universal fit cat from carsound and it is 16". They also make direct fit cats. The dimensions should be the same for the direct fit.
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