Cometic C5111-040 BMW MLS Cylinder Head Gasket Bore - S65B40 93mm 040 Inch

The Cometic C5111-040 is a high-performance Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for the BMW S65B40 4.0L V8 engine found in 2008-2013 M3 models. This precision-manufactured gasket features a .040 inch compressed thickness and 93mm bore diameter, delivering maximum sealing performance for high-output naturally aspirated and modified engines.

Key Features:

• Three-layer stainless steel construction for superior strength and durability
• Outer layers embossed and coated with Viton rubber on both sides for exceptional sealing
• Viton coating heat-resistant to 482°F (250°C) for extreme temperature environments
• Round bore shape optimized for BMW S65B40 V8 applications
• No sealants required for installation
• Ideal for aluminum head to aluminum block applications
• Resists corrosion while maintaining ability to rebound under thermal cycling
• Manufactured in the USA with American-sourced materials

Cometic MLS gaskets provide the reliability needed for both stock rebuilds and performance builds, withstanding the shearing forces created between dissimilar materials while maintaining consistent compression across the sealing surface. The embossed layers and Viton coating are designed to handle demanding sealing environments, varying load conditions, and different surface finishes with confidence.