Cometic MLX cylinder head gasket for Chevrolet Mark‑IV Big Block V8 (4.560in/115.82mm bore, .040in) uses HP shim technology to increase clamp load around the combustion chamber and improve sealing on open‑deck blocks. The multilayer MLX design includes an integrated stopper layer for combustion sealing and embossed outer layers with Viton coating to resist leakage and maintain clamp without widening bore distortion.
Cometic Chevrolet Mark-IV Big Block V8 115.82mm Bore .040in MLX Cylinder Head Gasket