Speedmaster PCE348.1022 LS MLS Head Gasket Set 4.160" Bore 0.040" Thick

The Speedmaster PCE348.1022 is a pair of multi-layer steel (MLS) head gaskets engineered specifically for Chevy GM LS engines. Featuring a 4.160" bore diameter and 0.040" compressed thickness, these gaskets are designed to handle extreme cylinder pressures in high-performance applications.

Key Features:

• Multi-layer steel construction for superior sealing under extreme conditions
• 4.160" bore diameter accommodates performance engine builds
• 0.040" compressed thickness for precise compression ratio tuning
• High-pressure steel laminate design resists shearing forces between aluminum heads and iron blocks
• Internal embossments distribute heat and expand under combustion pressure for improved sealing
• Compatible with aluminum-to-iron and aluminum-to-aluminum block combinations
• Maintains consistent contact pressure during thermal cycling and engine dynamics
• Sold as a pair for complete engine assembly

MLS gaskets offer significant advantages over conventional composite gaskets in forced induction and nitrous applications. The multi-layer steel construction provides better torque retention, reduced distortion, and superior sealing performance when combustion pressures and temperatures exceed stock levels. These gaskets are ideal for turbocharged, supercharged, and nitrous-injected LS builds where reliability under extreme conditions is critical.