what were the original exhaust systems on a 305 350 tpi
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From: SUDBURY
what were the original exhaust systems on a 305 350 tpi
were they all 2.5 inches from the manifolds to the 3 inch y pipe to the cat and 3 inch from the cat back . my 86 is exactly that thanks
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Joined: Jul 2002
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From: NW Ohio
Car: '91 RS
Engine: LO3, For now...
Transmission: 700R4
The largest stock intermediate pipe I know of from reading this forum is 2-3/4" and I believe that was on the 350 TPI. The Y-pipe I'm not sure about, but I suspect it's not stock, either.
Joined: Jul 1999
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From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
Re: what were the original exhaust systems on a 305 350 tpi
Originally posted by SMOKEN
were they all 2.5 inches from the manifolds to the 3 inch y pipe to the cat and 3 inch from the cat back . my 86 is exactly that thanks
were they all 2.5 inches from the manifolds to the 3 inch y pipe to the cat and 3 inch from the cat back . my 86 is exactly that thanks
Joined: Aug 1999
Posts: 19,282
Likes: 103
From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Actually, the 305 (to include the L69)/350 TPI had 2 1/4" manifold outlets. Note the difference between LG4 and L69 y-pipes. Oops.
JamesC
JamesC
Joined: Aug 1999
Posts: 19,282
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From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Here's the pic. By the way, the stock intermediate pipe at 2 3/4" was larger than the after market I had on orginally.
JamesC
JamesC
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