Copper Gasket Warning!
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Junior Member
Joined: Jul 2003
Posts: 77
Likes: 0
From: Humble, TX
Car: 1999 Trans Am
Engine: LS1
Transmission: 4L60E
Copper Gasket Warning!
do no use copper header gaskets with Hedman headers on the stock heads (416 casting for me), you will never get them to seal correctly....i ended up using the blue Fel-Pro ones with the steel core
TGO Supporter
Joined: Jul 2001
Posts: 4,991
Likes: 1
From: Cheyenne, Wyoming
Car: 1992 B4C 1LE
Engine: Proaction 412, Accel singleplane
Transmission: built 700R4 w/custom converter
Axle/Gears: stock w/later 4th gen torsen pos
what brand of coppers were you trying to use?
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