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The Cometic MLS head gasket for Chevrolet Mark‑IV Big Block V8 (4.570in bore, .040in) uses three to five stainless steel layers for strength and rebound. Embossed outer layers are coated with Viton on both faces for heat-resistant sealing up to 250°C, while the uncoated shim center allows tailored thickness. This MLS construction conforms load distribution across the sealing area, requires less clamp load and helps minimize bore distortion without sealants.
Cometic Chevrolet Mark-IV Big Block V8 .040in MLS Cylinder Head Gasket - 4.570in Bore
