Cometic H4293SP2044S MLS Head Gasket BMW N54 85mm .044" for 1/2" Bolts

The Cometic H4293SP2044S is a high-performance Multi-Layer Steel (MLS) head gasket engineered specifically for BMW N54B30 turbocharged inline-six engines. This gasket features an 85mm bore diameter and .044" (1.12mm) compressed thickness, making it an ideal choice for performance builds and high-boost applications.

Key Features:

• Designed for aftermarket 1/2" head bolts or studs - not compatible with OEM bolt patterns
• Multi-layer steel construction with embossed viton-coated stainless steel outer layers
• Variable stainless center layer allows for multiple thickness options
• 85mm bore diameter provides proper sealing for performance applications
• .044" compressed thickness ideal for compression ratio adjustment
• No re-torque required after initial installation
• Superior sealing performance under high boost and extreme cylinder pressure
• Coated with .001" thick viton rubber bonded to outer layers - install dry, no additional sealant needed

Application: This gasket is designed for BMW N54B30 engines found in 135i, 335i, 535i, Z4 35i, and X6 35i models. The H4293SP2044S variant is specifically engineered for engines running aftermarket 1/2" head studs, commonly used in high-performance builds exceeding 16+ PSI of boost. Replaces BMW OEM part numbers 11127557265 and 11127557266 when upgrading to larger head studs.

Cometic MLS head gaskets provide unmatched sealing performance for turbocharged applications and are resistant to corrosion. The multi-layer design acts as a spring to compensate for head lift and increased cylinder pressures, making this gasket essential for serious performance builds.