KPA-SBC13905050 Jesel SB Chevy Premium Stud Rocker 1.5/1.5 Ratio

First released in 1990, Jesel Premium Stud Rockers were developed for NASCAR teams before shaft rockers were deemed legal. Now, almost 30 years later, we have reengineered them to set the standard once again. For classes where shaft rockers are not allowed such as NHRA and IHRA Stock, engine builders worldwide can now purchase rocker arms worthy of the performance and strength expected with the Jesel name.

Machined from 2024 aluminum, the precision ultra-lite CNC bodies receive a shot-peened finish to help resist fatigue from stress and hot operating conditions. Dual 3/8” wide bearings with external thrust washers rotate on the precision ground tool steel trunnion to ensure stability throughout the RPM range. Jesel’s proven 3/8-24 cup style adjuster allows for precise valve lash setting and the rockers come standard with needle bearing nose rollers.

Unlike traditional stud rockers, Jesel Premium Stud rockers do not require annoying stud girdles or pushrod guide plates. The rocker pivots on a steel stanchion post which can be shimmed to adjust the rocker arm to valve tip geometry. The steel stanchion post engages into our patented retainer plate to keep the rocker arm perfectly aligned with the valve and is securely fastened to the cylinder head using a 7/16” to 3/8” stepped stud and ARP 12pt nuts.