WR has now commission ARP to design and produce the ultimate 356/912 head stud. When used with ARP Ultra Torque Assembly Lube and torqued to 28 ftlbs, these new studs provide a consistent tension on the head on warm up and cool down to provide a significant improvement in head seal when compared to the old original studs. Specifically designed for the WR 86/91mm cylinders, these studs are an excellent choice for any cast iron, biral, or alloy cylinder.

They have the high quality you'd expect from WR and have been tested and proven on our 2132cc engine.

We use them on every engine we build!