Speedmaster PCE348.1015 LS MLS Head Gasket Bore Thick - 3.945 0.040

The Speedmaster PCE348.1015 is a high-performance Multi Layer Steel (MLS) head gasket engineered specifically for Chevy GM LS engines. Featuring a 3.945-inch bore diameter and 0.040-inch compressed thickness, this single gasket is designed to withstand extreme cylinder pressures and temperatures in boosted and nitrous applications.

Key Features:

• Multi Layer Steel (MLS) construction with high-pressure steel laminate design
• 3.945-inch bore diameter with 0.040-inch compressed thickness
• Internal embossments that expand under heat for superior sealing
• Engineered to handle extreme shearing forces between aluminum heads and iron blocks
• Ideal for aluminum-to-iron and aluminum-to-aluminum block combinations
• Superior torque retention with minimal distortion compared to composite gaskets

MLS head gaskets maintain consistent contact pressure between the cylinder head and block throughout the engine's operating cycle, making them the preferred choice for high-horsepower builds with turbos, superchargers, or nitrous oxide systems. The multi-layer steel design provides exceptional resilience against the thermal expansion and combustion pressure spikes that would compromise traditional gaskets.