Cometic Viton-Coated Steel Base Gaskets w/3 5/8 in. big bore (S&S cylinders), .020 in. - C9989
Made using premium fuel-resistant materials that will not become brittle, crack or creep
Extreme Sealing Technology (EST) gaskets feature embossed steel gaskets covered with a proprietary rubber material or solid copper
Multi-Layer Steel (MLS) gaskets feature two outer Viton-coated embossed spring steel layers with an inner steel layer to provide support
Withstands the shearing forces created by aluminum heads on case iron blocks
MLS gaskets retain torque
Single-Layer Steel (SLS) gaskets feature a stainless steel core with embossed outer surfaces that create a heavy-duty seal between the center steel layer and the mating surface
Viton gaskets feature a stainless steel core with a .001" thick coating of viton rubber on both sides
Sold in pairs