Cometic Small Block Ford 289 - 351W MLS Head Gaskets, Valve Pockets, Yates Style, 4.180" Bore

Cometic Multi-Layer Steel MLS gaskets are comprised of three layers of stainless steel. The outer layers are an embossed viton coated stainless steel providing a superior seal with excellent rebound characteristics and are corrosive resistant. MLS head gaskets reduce bore distortion and withstand extreme cylinder pressures. Sold individually.

Cometic head gaskets go on dry because they are coated with a sealant. Each MLS head gasket is coated with a .001" thick viton rubber that is bonded to the outer stainless steel layers. Adding an additional sealer can hinder the performance of an MLS head gasket.

Gaskets are not designed to be used on engines with o-rings or receiver grooves. A surface finish of 50 RA (roughness average) or finer is recommended for proper gasket seal. Always refer to the manufacturer of the fastener to determine accurate torque values.