Cometic MLX Head Gasket 4.200" Bore 0.040" Thickness Multi-Layered Stainless Steel - SB Ford BR10073 These gaskets are used between

These gaskets are used between the upper and lower manifolds to create an air tight seal and prevent erratic idle if a vacuum leak is present

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Useful for Low Rear End Gear Ratios

Cometic MLX Head Gasket 4.200" Bore 0.040" Thickness Multi-Layered Stainless Steel - SB Ford BR10073 These gaskets are used betweenComprised 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