Cometic BMW 4.0L 07-08 93mm Bore .040 inch MLS Head Gasket

Cometic Gasket is known for making well-built sealing components, and this Multi-Layer Steel (MLS) head gasket is a prime example for your 2008-2013 BMW M3. If you're rebuilding the top end of your S65B40 engine, a quality head gasket is crucial for maintaining proper compression and preventing leaks between the cylinder head and the engine block. This gasket is specifically designed with a 93mm bore and a compressed thickness of 0.040 inches to match your M3's specifications.

What sets this gasket apart is its construction. It uses multiple layers of stainless steel for strength and resilience, which helps it rebound and resist corrosion. The outer layers are coated with Viton, a heat-resistant rubber material that can handle temperatures up to 482 degrees Fahrenheit, ensuring a solid seal even under demanding conditions. This design works well whether you have aluminum heads and an aluminum block, or aluminum heads with a cast iron block, as it can manage the shearing forces between different metals. Because it's an MLS gasket, it doesn't require any additional sealants, simplifying the installation process.