Cometic GM LS1 SB 3.910 inch Bore .027 inch MLS Head Gasket

If you're working on a GM LS Gen-3 or Gen-4 small block V8 engine, this Cometic Multi-Layer Steel (MLS) head gasket is a solid choice for sealing your cylinder heads. It's specifically made for a 3.910 inch bore and has a compressed thickness of 0.027 inches, which is important for maintaining your engine's compression ratio.

These MLS gaskets are well-built with multiple layers of stainless steel, giving them strength and resistance to corrosion. The outer layers are coated with Viton, a heat-resistant rubber material that handles tough sealing jobs without needing any extra sealants. This construction makes them suitable for pairing aluminum heads with either aluminum or cast iron blocks, as they can manage the different expansion rates and shearing forces between those materials.

This gasket is designed to provide maximum sealing performance for engines that produce more power than stock. It fits a wide range of GM vehicles, including popular models like the Chevrolet Corvette, Silverado, and Tahoe, as well as GMC Sierra and Cadillac CTS. Always refer to the manufacturer's installation instructions for proper torque sequences and procedures.