Premium Grade 8740 chrome moly steel construction ensures superior fatigue strength and durability
Heat treated to 200,000 psi for maximum clamping force and engine sealing
Centerless ground for perfect concentricity, reducing vibration and improving fit
Reduced wrenching hex or 12-point flanged head allows easy installation without valve train removal
Includes hardened parallel ground washers for even load distribution and accurate torque
Summarized by Shop
t 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.
For openers, ARP uses a premium grade 8740 alloy that is rated far superior to “aircraft” quality. Each stud is plac