ARP Head Studs

These Professional series studs are cold-forged to ensure molecular integrity, heat-treated prior to thread rolling and machining, and are rated at a whopping 190,000 psi. The Pro series are also available 12-point nuts, and all kits come complete with hardened parallel washers for even load distribution and accurate torque readings.

It is for good reason that virtually every top professional engine builder relies on ARP® Pro Series head studs for their all-out competition powerplants. Simply stated, there’s not a better stud setup on the market today.