lt1 swap headers???
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Junior Member
Joined: Nov 2011
Posts: 58
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Car: berlinetta
Engine: Lt1
Transmission: t56
Axle/Gears: 3.42
lt1 swap headers???
Ok so I am upgrading my 83 berlinetta once again goin lt1 but I'm curious if I can use my oval port headers I know that the lt1 has D ports but wanna know if someone has used different gaskets (for D ports) and not have issues or if an adapter can be made I really don't wanna buy new headers my exhaust system is virtually new
Joined: Mar 2000
Posts: 43,187
Likes: 42
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
Most 1-5/8" primary headers will cover the D-ports.
Which headers do you have? You may want to consider welding a bead around the tubes on the outer side of the flange and then gasket matched the flanges. You may need to redo the gasket sealing surfaces on the inside of the flange afterward.
Which headers do you have? You may want to consider welding a bead around the tubes on the outer side of the flange and then gasket matched the flanges. You may need to redo the gasket sealing surfaces on the inside of the flange afterward.
Thread Starter
Junior Member
Joined: Nov 2011
Posts: 58
Likes: 0
Car: berlinetta
Engine: Lt1
Transmission: t56
Axle/Gears: 3.42
Re: lt1 swap headers???
i have a set of summit racing headers on it, and why weld outside the flange? is it cause its a common leaking point?
Joined: Sep 2004
Posts: 5,906
Likes: 240
From: Chicagoland Suburbs
Car: 1989 Trans Am GTA
Engine: LT1, AFR 195cc, 231/239 LE cam.
Transmission: M28 T56
Axle/Gears: 3.23 10bolt waiting to explode.
Re: lt1 swap headers???
Ok so I am upgrading my 83 berlinetta once again goin lt1 but I'm curious if I can use my oval port headers I know that the lt1 has D ports but wanna know if someone has used different gaskets (for D ports) and not have issues or if an adapter can be made I really don't wanna buy new headers my exhaust system is virtually new
Heck, my Hooker 2055 shorties with 1 5/8th" primaries work fine.
Thread Starter
Junior Member
Joined: Nov 2011
Posts: 58
Likes: 0
Car: berlinetta
Engine: Lt1
Transmission: t56
Axle/Gears: 3.42
Joined: Sep 2004
Posts: 5,906
Likes: 240
From: Chicagoland Suburbs
Car: 1989 Trans Am GTA
Engine: LT1, AFR 195cc, 231/239 LE cam.
Transmission: M28 T56
Axle/Gears: 3.23 10bolt waiting to explode.
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