The HP shim technology increases clampload around the combustion chamber, thereby increasing the sealability of the head gasket around the open deck block.
Cometic GM LS1/LS2/LS3/LS6 Gen-III/IV Small Block V8 4.080in Bore .040in MLS Cylinder Head Gasket
GM LS1/LS2/LS3/LS6 Gen-III/IV Small Block V8 .040" MLS Cylinder Head Gasket, 4.080" Bore
Cylinder Head Gasket; 0.040 in. Multi-Layer Steel; 40.080 in. Bore;
GM LS1/LS2/LS3/LS6 Gen-III/IV Small Block V8 Cylinder Head Gasket
GM LS1/2/3/6 Gen-III/IV V8 Cylinder Head
Engine Cylinder Head Gasket
Cylinder Head Gasket
Head Gasket