Cometic 4.150" Bore Head Gasket 0.040" Thickness Multi-Layered Steel GM LS-Series - LS7 26-NSO-N-LXL This axle-back exhaust system easily

This axle-back exhaust system easily mounts to the factory mid-pipe for a hassle-free installation

2006-2007 Chevrolet Monte Carlo

C15 Pickup

Indexing positions the ground strap of the spark plug properly for best piston dome clearance and un-shrouds the electrode for a more even burn and possible gains of 5-15 horsepower

Cometic 4.150" Bore Head Gasket 0.040" Thickness Multi-Layered Steel GM LS-Series - LS7 26-NSO-N-LXL This axle-back exhaust system easilyComprised of multiple embossed layers of stainless steel with the outer layers utilizing a Viton rubber coating. Compressed operating thickness is 0. 040". Cometic MLS (Multi Layer Steel) Head Gaskets provide maximum sealing performance for todays high output engines and require no sealants. MLS gaskets are ideal for both aluminum heads to aluminum blocks and aluminum heads to cast iron blocks. They can withstand the shearing force created by the two