ARP Perma-Loc Rocker Arm Adjuster - For Stamped Steel Rocker Arms - 3/8"-24 Thread R040004L Available in swivel and non-swivel

Available in swivel and non-swivel designs

1985-2003 Buick Century

Full 360-degree air channeling providing ultimate airflow

After a rigorous design and testing phase

ARP Perma-Loc Rocker Arm Adjuster - For Stamped Steel Rocker Arms - 3/8"-24 Thread R040004L Available in swivel and non-swivelA 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.