
Cometic’s MLS‑5 head gasket for Chevrolet Gen‑1 small block V8 delivers a 4.200" bore with a .066" compressed thickness and steam holes, made from multiple embossed stainless steel layers and Viton‑coated outer layers. The MLS construction provides robust sealing across aluminum and cast‑iron interfaces without additional sealants, resists shearing forces, and helps distribute clamp load to reduce bore distortion in high‑stress engines.
Cometic Chevy Small Block 4.200 inch Bore .066 inch MLS-5 Head Gasket (w/All Steam Holes)