Cometic C15257-044 BMW MLS Cylinder Head Gasket Bore - N54B30 85mm 044

The Cometic C15257-044 is a premium Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for BMW N54B30 turbocharged inline-6 engines. This high-performance gasket features a compressed thickness of .044 inches and an 85mm bore diameter, making it ideal for both stock rebuilds and performance applications.

Key Features:

• Multi-Layer Steel (MLS) construction for superior sealing and durability
• .044" compressed gasket thickness for precise compression ratio control
• 85mm bore diameter designed for N54B30 engine specifications
• Engineered to withstand high cylinder pressures in turbocharged applications
• Viton rubber coating provides excellent resistance to oil and coolant
• Stopper layer embossments around combustion chambers and water jackets prevent leaks

Cometic MLS gaskets are constructed from multiple layers of stainless steel, which allows the gasket to adapt to the expansion and contraction of the engine block and cylinder head during heat cycling. This design makes them particularly well-suited for high-performance and forced induction engines like the BMW N54B30, where maintaining a reliable head gasket seal under extreme conditions is critical.

The N54B30 engine was used in various BMW models from 2006-2016, including the 335i, 535i, Z4, and 1M Coupe. This gasket is sold individually and is designed for single-cylinder application on the inline-6 configuration.