Stock cat diameter?
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Junior Member
Joined: May 2005
Posts: 41
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Car: 87 IrocZ
Engine: 350
Transmission: 700r4
Stock cat diameter?
Hey guys,
I just purchased hedman shortie headers and the hedman ball flange y pipe which is 2.5 inlet and 2.5 outlet. I was wondering, what am i going to have to do to keep the stock cat. its wierd, because i have the stock cat on my car, but an aftermarket exhaust. Im not really even sure what diameter that is. but it is NO DOUBT way newer than say the y pipe is.
what do you guys suggest?
yes, my cat is gutted, so i'd rather just keep it and save money haha.
I just purchased hedman shortie headers and the hedman ball flange y pipe which is 2.5 inlet and 2.5 outlet. I was wondering, what am i going to have to do to keep the stock cat. its wierd, because i have the stock cat on my car, but an aftermarket exhaust. Im not really even sure what diameter that is. but it is NO DOUBT way newer than say the y pipe is.
what do you guys suggest?
yes, my cat is gutted, so i'd rather just keep it and save money haha.
Joined: Mar 2000
Posts: 43,187
Likes: 45
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
If the 350 is the factory engine, then your cat inlet is 3".
If the 350 is not the factory engine, then we'd have to know what was.
If the 350 is not the factory engine, then we'd have to know what was.
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