ARP Perma-Loc Rocker Arm Adjuster - For Stamped Steel Rocker Arms - 7/16"-20 Thread SC04101 1970-1972 Buick GS 455

1970-1972 Buick GS 455

1984-1995 GMC G1500

axle retainer

Use a dark shield during the day and raise it to ride home at night without sacrificing protection

ARP Perma-Loc Rocker Arm Adjuster - For Stamped Steel Rocker Arms - 7/16"-20 Thread SC04101 1970-1972 Buick GS 455A rocker arm adjuster that doesn't require special tools and won't work loose. Threads on the heat treated Perma Loc Adjusters are machined exactly perpendicular to the adjuster bottom. a set screw is also machined flush on the bottom. All of these features help eliminate setting valve lash on a regular basis. ARPs product line contains thousands of part numbers, and has expanded to include virtually every fastener found in an engine and driveline.