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The Cometic MLS head gasket for GM LS1/LS2/LS3/LS6 Gen‑3 small‑block V8 engines (4.125" bore, 0.060" compressed thickness) comes with Darton MID sleeves and uses embossed stainless steel layers with Viton‑coated outer faces to seal high‑output engines without sealants. It fits aluminum heads on aluminum or cast‑iron blocks and withstands shear between dissimilar materials. The center stainless shim allows thickness variation while embossed layers conform load distribution and limit bore distortion.
Cometic GM LS1 (w/M.I.D. Sleeves) 4.125 inch Bore .060 inch MLS-5 Head Gasket
