PRO J2K SERIES SHAFT ROCKERS

Introduced in 1999 primarily for the NASCAR circuit and currently available for limited applications, JESEL’S Pro-J2K Series are a lightweight, high-end alternative to our standard Pro Series line. All J2K rocker arms are manufactured from a custom blend, shotpeen finished aluminum alloy for durability and cycle life needed at elevated operating temperatures experienced in endurance racing. The use of this material in conjunction with the dual diameter modular shaft provides for an extremely lightweight yet rigid rocker arm. This unique shaft design allows the JESEL engineers to use a .562” O.D. shaft bearing to increase the critical bearing strap area needed to reduce body deflection. This same shaft also allows for .750” diameter clamping area and provides enough room for a 7/16” mounting stud to securely fasten the rocker to the mounting stand. All J2K rockers come standard with a .250” needle nose roller and can be fitted with our Tool Steel Ball Adjuster which adds over .100” worth of critical thread area.

As a spin-off from this technology, JESEL has developed a super light yet durable rocker system geared towards the sprint car community. By combining the J2K rocker assemblies along with an aluminum mounting stand, the JESEL engineers have developed a complete V8 rocker kit that weighs in at a scant 12 lbs. The aluminum mounting stands can be machined and fitted for a valve spring oiling option to cool the springs for extended spring life.