Head Stud Kit 12pt GM LS 2003 & Earlier

The Head Stud Kit 12pt GM LS 2003 & Earlier by ARP is designed for LS engine builders and performance enthusiasts seeking reliable cylinder head clamping in both naturally aspirated and boosted applications. This kit is particularly beneficial for those working on turbocharged or supercharged LS builds, where factory head bolts may fail under high combustion pressures.

Manufactured from 8740 chromoly steel, ARP head studs offer a tensile strength of 200,000 PSI, significantly surpassing OEM hardware. The 12-point head design ensures even load distribution across the fastener, enhancing grip during installation and reducing the risk of thread stripping. Each stud undergoes individual heat treatment and shot peening to eliminate surface stress risers, extending its fatigue life under repeated combustion cycles.

Engine builders upgrading to forced induction, high-compression pistons, or aggressive cam profiles will find this head stud kit particularly advantageous, as increased cylinder pressure can lead to head lift and gasket failure. The kit includes all necessary hardware and ARP's proprietary assembly lubricant, which is crucial for achieving accurate torque specifications on compatible GM LS engine platforms.