Rocker Arm Nut Kit

The ARP 300-8247 Rocker Arm Nut Kit is a set of 16 components engineered for valvetrain precision. Each nut features a 7/16-20 in thread size, a 0.560 in shank diameter, a 0.750 in body diameter, and a length of 2.050 in. The Perma-Loc design of these rocker arm adjusters prevents them from working loose without requiring special tools. The adjuster body is heat-treated throughout, unlike some competitors that are only case-hardened, which helps to eliminate thread movement. This ensures consistent valve lash adjustments and maintains engine performance over time. This kit is suitable for use on Emissions Controlled Vehicles, Uncontrolled Vehicles, and Racing Use Only Vehicles.