Speedmaster PCE348.1033 LS MLS Head Gasket Set 4.200 Bore 0.040 Thick

The Speedmaster PCE348.1033 MLS (Multi-Layer Steel) head gasket set is engineered for high-performance Chevy GM LS engines with a 4.200-inch bore and 0.040-inch compressed thickness. This pair of gaskets is designed to withstand extreme cylinder pressures and temperatures in demanding applications including forced induction, nitrous oxide, and high-compression builds.

Key Features:

• Multi-layer steel construction with high-pressure laminate design for superior sealing
• Internal embossments that expand under heat to enhance seal integrity at extreme temperatures
• Optimized for aluminum heads to cast iron blocks and aluminum-to-aluminum combinations
• Maintains consistent contact pressure between cylinder head and block during engine operation
• Resists high shearing forces common in mixed-metal engine assemblies
• Superior torque retention and reduced distortion compared to composite gaskets
• 4.200-inch bore size with 0.040-inch compressed gasket thickness

MLS head gaskets are the proven choice for builders seeking reliability in turbocharged, supercharged, and nitrous applications where conventional composite gaskets fail. The multi-layer steel design provides exceptional durability and sealing performance under the extreme conditions of high-horsepower LS engine builds.