Porsche Ultra Cylinder Head Stud Kits for 356 and 912.

These WR head studs are engineered to outperform conventional options. Originally developed for our 1950cc and 2.2L engine kits, they’re manufactured from a specially heat-treated alloy designed to retain strength through repeated heat cycles—ensuring a more consistent and reliable cylinder-to-head seal.

When torqued to 30 ft-lbs using the included ARP Ultra-Torque Assembly Lubricant, and paired with our copper head gaskets, these studs deliver exceptional clamping stability for your 356/912 engine.

Each kit includes 16 WR head bolts and one pack of ARP Ultra-Torque Assembly Lubricant.