Cometic BMW 4.0L 07-08 93mm Bore .027 inch MLS Head Gasket

If you're working on the 4.0L S65B40 engine in your 2008-2013 BMW M3, this Multi-Layer Steel (MLS) head gasket from Cometic is built to handle the job. It's designed to provide a strong seal between the cylinder head and the engine block, which is crucial for maintaining compression and preventing coolant and oil leaks.

This gasket uses multiple layers of stainless steel for increased strength and resistance to corrosion. The outer layers are coated with Viton, a heat-resistant rubber material that can handle high temperatures up to 482°F (250°C), making it suitable for demanding engine conditions. The center layer is stainless steel and can be varied in thickness; in this case, it's set to a compressed thickness of 0.027 inches with a 93mm bore to match your M3's specific engine dimensions. MLS gaskets like this one are great for sealing aluminum heads to aluminum blocks or aluminum heads to cast iron blocks, as they can manage the stresses between different metals.