Header bolts?
Thread Starter
Racer
Joined: Nov 2013
Posts: 332
Likes: 41
From: Mesa, AZ
Header bolts?
Getting ready to start header install on the '04 coupe, LG long tubes. Thinking of replacing stock manifold bolts with stainless. Could someone tell me the bolt dimensions so I get a match? also, what torque setting when installing the bolts. I did order 2000 LS1 gaskets, GM, round to match header instead of oval. Does anyone recommend using the copper gasket sealer, such as Permatex?
I do have anti seize, both high temp copper and regular for other than plugs, header bolts and O2 sensors.
Thank you
Chas
I do have anti seize, both high temp copper and regular for other than plugs, header bolts and O2 sensors.
Thank you
Chas
Acct Suspended APR 2026 by request
Joined: Dec 2010
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2020 Corvette of the Year Finalist (performance mods)
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header bolts are m8x1.25x30mm and if I remember correctly torque is 18ft/lbs... I wouldn't worry about using any sealant on the gaskets, they work great as is... just use anti-seize on the header bolts and plugs and you should be good
Thread Starter
Racer
Joined: Nov 2013
Posts: 332
Likes: 41
From: Mesa, AZ
1/4 mile/AutoX
Joined: Jun 2014
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From: Buffalo Texas
