The ARP 234-4317 Pro Series head stud kit delivers professional-grade reliability for 2004 and newer GM LS engines. Engineered for high-performance and competition applications, this complete kit provides superior clamping force and precision alignment compared to factory head bolts.
Premium 8740 Chrome Moly Construction:
Each stud is manufactured from premium grade 8740 chrome moly steel and heat-treated to 200,000 psi tensile strength. The studs are placed vertically in specialized racks during heat treatment to ensure complete and uniform heat penetration throughout the material. This vertical heat-treat process produces far superior results compared to conventional basket heat-treating methods.
Precision Manufacturing Process:
- Cold-forged construction ensures molecular integrity
- Centerless ground after heat-treat for exceptional straightness and concentricity
- Thread rolled after heat-treat for superior fatigue strength
- Machined to exacting tolerances for perfect gasket and cylinder head alignment
- 12-point nut design with reduced wrenching profile
Complete Kit Includes:
- High-strength 8740 chrome moly head studs (M11 x 2.0 and M8 x 1.25 threads)
- 12-point nuts with wide-area flanges
- Hardened parallel-ground washers for even load distribution
- Black oxide finish for corrosion resistance
Performance Advantages:
Head studs provide more accurate and consistent torque loading compared to bolts because they stretch only on the vertical axis during installation. The stud design eliminates the twisting forces that occur when torquing head bolts, resulting in more uniform clamping pressure across the head gasket. The 12-point nut design and wide flange eliminate the need for valve train removal during cylinder head retorquing and accommodate larger diameter valve springs.
Application:
Designed specifically for 2004 and newer GM Gen III/IV LS engines with all same-length stud configurations, including 4.8L, 5.3L, 5.7L, 6.0L, 6.2L, and 7.0L engines (LS1, LS2, LS3, LS6, LS9, L92, L76, LY6, and related variants).
Every ARP stud is stamped with the ARP logo as your assurance of quality and is backed by ARP's zero-defect, zero-failure quality standard. This is the same head stud kit relied upon by professional engine builders in all forms of racing.
