4th gen Exhaust interchangeability

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04-09-2011, 10:56 AM

camaro_V6_Tuner

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Car: 2002 Trans Am WS6

Engine: LS1

Transmission: T56

Axle/Gears: 4.10

4th gen Exhaust interchangeability

how much of a 4th gen exhaust will fit on a 3rd gen? I know they say that LS1 headers cannot be used on a 3rd gen but will they fit with some small modifications? What about the Y pipe? Will that fit? How about the Catback? Are 3rd gen and 4th gen catbacks the same? I only ask because I'm leaning toward getting a 4th gen parts car and doing a LS1 swap in my 3rd gen. If the parts car has aftermarket exhaust, I'd like to use whatever I can to keep the swap as low budget as possible.

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04-09-2011, 08:06 PM

//<86TA>\\

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Car: 86 Trans Am, 92 Firebird

Engine: 408 sbc, 3.1L of raw power

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Re: 4th gen Exhaust interchangeability

most of the intermediate pipe and the pipes rearward will work, the y-pipe is routed differently and wont work.
hangers may be a little different.

some fab and welding will be needed, but they can work

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04-10-2011, 03:05 AM

Screamin86

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Car: 86 Trans Am,03 Yukon,92 Z28

Engine: 5.3, 5.3, lb9

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Re: 4th gen Exhaust interchangeability

pretty much what he said. i had a stock 4thgen catback on my 82 trans am for some time before i sold it i had to make my own hangers for the rear and i had a 3.5in I pipe with a cutout that merged with the over the axle pipe from the 4thgen.