CJM x P1 Mfg S220, 11mm Head Stud Kit

We have partnered with P1 Manufacturing, a leader in Formula 1, NASCAR, and NHRA head stud technology. Their S220 material and high-accuracy heat-treat process produce an exceptionally strong and reliable head stud

The higher-strength S220 material delivers increased clamping force, helping prevent cylinder-head lift and the head-gasket failures that often follow elevated power levels. Offering strength equal to or greater than ARP 2000, the S220 stud provides a superior option for demanding, high-performance engine builds.

Their Torque Point lube has been carefully developed to reduce clamp-load variation, ensuring consistent and high clamp loads.

Designed for high-horsepower Subaru engines, the S220 stud allows for higher torque values, increased clamp load, and improved sealing performance under extreme boost and elevated cylinder pressures.