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Cometic's MLS head gasket for Chevrolet Gen‑1 Small Block V8 supplies durable sealing for high‑output rebuilds. It fits a 4.200 in bore and is offered in a nominal 0.140 in thickness with valve pocketing and steam holes for practical compatibility. The gasket pairs embossed stainless steel outer layers coated with Viton and an uncoated center shim to resist corrosion, permit thickness variation, conform load across the sealing area, and require less clamp load to help reduce bore distortion.
Cometic Chevy Gen-1 Small Block V8 .140in MLS Cylinder Head Gasket - 4.200in Bore
