ARP 300-8248 Perma-Loc Rocker Arm Adjuster Nut Kit - 7/16-20 Thread, 12-Point, 16-Piece Set

Building a performance engine? Don't cheap out on the valvetrain. This ARP 300-8248 kit is for the serious builder. It includes 16 high-strength, 12-point rocker arm adjuster nuts with a 7/16-20 thread. These are ARP's 'Perma-Loc' style, which are designed for use with stud girdles to lock everything in place and prevent valve lash from changing under high RPM. They're made from premium materials and heat-treated for maximum strength and durability – exactly what you need when you're spinning high lift, high spring pressure camshafts. ARP is the gold standard in fasteners for race engines, and these adjusters are made right here in the USA with their legendary quality control. They’re a direct replacement for weak or worn stock adjusters and are a must-have for any performance small block or big block Chevy (and other applications – check your thread size!). Get your valvetrain solid and reliable.