Speedmaster PCE348.1006 Chevy 400 MLS Head Gasket 4.100" Bore 0.040" Thick

The Speedmaster PCE348.1006 is a high-performance Multi Layer Steel (MLS) head gasket engineered specifically for Chevy 400 small block applications. Featuring a 4.100-inch bore diameter and 0.040-inch thickness, this single head gasket is designed to withstand extreme combustion pressures and temperatures in high-horsepower builds.

Key Features:

• Multi Layer Steel (MLS) construction with high-pressure steel laminate design
• 4.100-inch bore diameter, 0.040-inch compressed thickness
• Internal embossments that expand under heat for superior sealing
• Maintains consistent contact pressure between cylinder head and block during engine operation
• Exceptional resistance to high shearing forces between aluminum heads and iron blocks
• Compatible with both aluminum-to-iron and aluminum-to-aluminum block configurations
• Superior torque retention and reduced distortion compared to composite gaskets

MLS head gaskets are the proven choice for extreme applications including heavy nitrous oxide systems, turbocharger setups, and supercharged engines. The multi-layer steel construction handles the demanding conditions of high cylinder pressure while preventing head lift and maintaining seal integrity. Ideal for serious engine builders seeking reliable performance in competition and high-output street applications.