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The Cometic MLS cylinder head gasket for Chevrolet Gen‑1 Small Block V8 (4.200" bore, 0.120" compressed thickness) fits round‑bore, 18/23° heads and includes steam holes. Multi-layer stainless steel construction uses embossed outer layers coated with Viton/AMP and a variable uncoated shim for thickness control and rebound. It seals aluminum head/block combinations without sealants, resists corrosion and helps distribute clamp load to reduce bore distortion.
Cometic Chevy Small Block 4.200 inch Bore .120 inch MLS Head Gasket (w/All Steam Holes)
