4.185 MLS Head Gasket .045 GM LSX LH

The Cometic Gaskets 4.185 MLS Head Gasket .045 GM LSX LH is a left-hand driver-side cylinder head gasket engineered for high-performance GM LS-series engine builds. This multi-layer steel gasket delivers the seal integrity required in modified LSX platforms where compression thickness and bore diameter are critical to combustion chamber performance and long-term reliability.

Constructed from multi-layer steel (MLS) material, this gasket offers superior durability compared to conventional composite gaskets, particularly in high-boost, nitrous, or extensively modified applications. The 4.185-inch bore diameter matches LS-series block specifications, while the 0.045-inch compression thickness is designed to work with specific piston-to-head clearance requirements and combustion chamber volumes common in performance LS builds. MLS gaskets provide consistent sealing across thermal cycling and maintain clamp load retention better than alternative constructions, reducing the risk of head gasket failure under sustained high-load conditions.

This gasket is suited for builders and engine shops assembling LS or LSX platforms for street performance, bracket racing, or forced-induction use. Proper head bolt torque procedure and surface preparation are essential for optimal gasket sealing. The left-hand designation ensures correct fitment on the driver's side of the engine block.

Cometic Gaskets specializes in precision gasket solutions for performance and racing engines, with a reputation for manufacturing gaskets that perform reliably under elevated temperatures, pressures, and combustion loads. This head gasket is a single unit and must be paired with a corresponding passenger-side gasket for a complete cylinder head seal set.

Part Number C5936-045 | SKU CAGC5936-045 | UPC 191070144845