These Pro series rocker arm studs from ARP are ideal for competition applications. They are made from 8470 chromoly steel and are heat-treated to 200,000 psi tensile strength.

These Pro series rocker arm studs from ARP are ideal for competition applications. They are made from 8470 chromoly steel and are heat-treated to 200,000 psi tensile strength.

These Pro series rocker arm studs from ARP are ideal for competition applications. They are made from 8470 chromoly steel and are heat-treated to 200,000 psi tensile strength

Headers can represent a sizable investment, so you'll want to keep them securely attached. In addition, exhaust leaks can cost you power and even cause damage to your vehicle.

Headers can represent a sizable investment, so you'll want to keep them securely attached. In addition, exhaust leaks can cost you power and even cause damage to your vehicle.

Pro series cylinder head studs from ARP are cold-forged to ensure molecular integrity. They are heat-treated prior to thread rolling and machining and are rated at a whopping 220,000 psi.

ARP uses a premium grade 8740 alloy that is rated far superior to "aircraft" quality. Then, each stud is placed vertically in special racks and precisely heat-treated to 220,000 psi.