LAKEWOOD, NJ – While Jesel has built its brand of valvetrain innovation with shaft rocker systems there are some race sanctioning bodies that still prohibit shaft rocker conversions such as NHRA and IHRA Stock Eliminator classes. Despite their extreme sophistication in many respects, these “stockers” are still required to run stud rockers.
Back in the early ‘90s Jesel designed high tech stud rockers for NASCAR racers that faced similar rules restrictions at the time. Jesel has reintroduced its innovative design with several new features made possible with improvements in materials and machining operations. However, true to their unique design, they require no bothersome stud girdles or guideplates – instead, the rocker pivots on a steel stanchion post that engages Jesel’s patented retainer plate to keep the rocker arm perfectly aligned with the valve. It is securely fastened to the cylinder head using a 7/16” to 3/8” stepped stud and ARP 12-point nuts. The steel stanchion post can be shimmed up or down to adjust the rocker arm height for correct valve tip geometry.