Remflex exhaust header gaskets are made from 100% graphite to seal header and manifold flanges under extreme heat. This gasket fits GM LT1 and LT4 D-Port heads. The graphite construction includes a built-in 50% crush that conforms to warped, pitted, or uneven sealing surfaces, and it rebounds against the flanges as they heat and cool so the joint stays sealed without re-torquing.
- Material: 100% graphite
- Heat resistant up to 3,000 degrees F
- Built-in 50% crush fills gaps and surface imperfections up to 1/16 inch
- Rebounds against the sealing surfaces, so it never needs re-torquing
- Fits: GM LT1 and LT4 D-Port heads
- Part number: 2042
FAQ
What does the 2042 gasket fit?
The 2042 gasket fits GM LT1 and LT4 D-Port heads.
Does this gasket need to be re-torqued?
No. The graphite rebounds against the sealing surfaces as they heat and cool, so the gasket does not require re-tightening after installation.
Will it seal a warped or pitted flange?
Yes. The built-in 50% crush lets it fill gaps and surface imperfections up to 1/16 inch.
What temperature can it handle?
The 100% graphite material is heat resistant up to 3,000 degrees F.

