Cometic 4.150" Bore Head Gasket 0.040" Thickness Driver Side Multi-Layered Steel - 6-Bolt Head RU004004L this is a permanent solution

this is a permanent solution that replaces a welded in O2 bung

silver faced background

& Extreme Tuning

Includes Neutral Safety Switch

Cometic 4.150" Bore Head Gasket 0.040" Thickness Driver Side Multi-Layered Steel - 6-Bolt Head RU004004L this is a permanent solutionComprised of multiple embossed layers of stainless steel with the outer layers utilizing a Viton rubber coating. Compressed operating thickness is 0. 040". 18 Bolt Heads. Left Side. Cometic MLX (Multi Layer Stopper) gaskets utilize an integrated stopper layer for combustion chamber sealing and improved clamp load around the cylinder without increasing bore distortion. MLX technology can be found in some head gaskets and are made from the same