4.185 MLS Head Gasket .051 - GM LSX RH

The 4.185 MLS Head Gasket .051 - GM LSX RH from COMETIC GASKETS is engineered for serious LS engine builders and performance enthusiasts who demand precision sealing in high-compression or boost applications. This multi-layer steel gasket serves as the critical seal between your cylinder head and engine block, preventing coolant and combustion leakage while maintaining compression integrity across all RPM ranges. Whether you're building a naturally aspirated LSX stroker or a turbocharged powerplant, this right-hand gasket ensures reliable, repeatable performance on the dyno and the street.

The .051-inch compression thickness is purpose-built to achieve the exact deck height and compression ratio your LS engine specification demands, making it ideal for custom-machined blocks or heads that require precise stack-up tolerances. COMETIC's multi-layer steel construction provides superior pressure retention and thermal stability compared to conventional gaskets, resisting blow-out under transient boost spikes or extreme combustion pressures common in modified engines. The 4.185-inch bore diameter matches the specific cylinder throat geometry of your LSX head, ensuring optimal sealing surface contact and eliminating the risk of misalignment or gasket creep that plagues oversized or undersized alternatives.

This right-side (RH) gasket is essential for complete LS engine builds requiring individual head gaskets per cylinder bank, commonly found in LS1, LS3, LS7, and LSX platform engines. Proper installation demands careful deck surface preparation, correct fastener torque sequencing, and use of appropriate head gasket sealer—factors that separate a leak-free build from a costly nightmare. Machinists, engine assemblers, and DIY builders tackling serious displacement or forced-induction projects will recognize COMETIC's reputation for precision and durability in competition and street applications alike.