ARP 1307404 GM Duramax LMM 6.6L Head Stud Kit 12-Point Street

The ARP 1307404 Head Stud Kit is designed specifically for 2007.5-2010 GM Duramax LMM 6.6L diesel engines, providing the superior clamping force needed for high-performance street applications. This premium kit is essential for trucks running increased boost levels or modified tunes, offering reliable protection against head gasket failure.

Key Features:

• ARP2000 material construction with 220,000 PSI tensile strength
• Premium grade 8740 alloy rated superior to aircraft quality
• Heat-treated prior to thread rolling for optimal fatigue strength
• Thread rolled after heat treatment for 10x better fatigue life
• Chrome-moly steel 12-point nuts for precise torque application
• Parallel-ground hardened washers included for even load distribution
• Centerless ground studs ensure perfect alignment during assembly

Each stud is vertically heat-treated in special racks to ensure complete heat penetration and consistent strength throughout the fastener. The 12-point nut design provides superior grip and allows for accurate torque readings, while the included parallel-ground washers distribute clamping forces evenly across the cylinder head surface. This kit is ideal for performance street builds running up to 45+ PSI of boost and provides critical insurance against head lifting and gasket failure on the Duramax LMM platform.