Head studs offer the most even and precise torque clamp when heads are installed. Head bolts impart not only a clamping force but also a rotational force when torqued to spec, which makes the clamping force less accurate. Still, aftermarket head bolts are more than adequate for the vast majority of non-competition vehicles that are street driven. Shown are ARP head studs in a GM 6.2L being built at Tilden Motorsports. ARPs head stud kits includes everything necessary to upgrade this engine and others to studs with nuts, washers, and lubricant, replacing the factory’s TTY head bolts in this application.