HEAD STUD KIT A SERIES 9 STUD ARP – WP25025
Upgrading to ARP head studs provides a major reliability boost over standard or budget aftermarket fasteners, which are far more susceptible to stretching under load. Once a stud stretches, consistent and accurate head‑torque becomes impossible, increasing the risk of head‑gasket failure. ARP studs eliminate this issue by delivering exceptional strength, stability, and repeatable clamping force.
This complete kit replaces every critical fastener in the cylinder‑head and rocker‑gear assembly. It includes the main head studs, rocker‑pedestal studs, and all required nuts and washers. Ours are for the 11‑stud cylinder‑head configurations (WP engines are built this way), but there is a 9 stud option
Kit includes
- 4 × long head studs
- 7 × short head studs
- 11 × 3/8″ UNF multi‑point nuts
- 11 × heavy‑duty washers
- 4 × rocker‑pedestal studs
- 4 × 5/16″ UNF multi‑point nuts
- 4 × rocker‑pedestal washers
- 1 × ARP fastener lube
Alternative to CAM150, CAM151,CAM4545, 51K1193














