Pro Series KPS-505209 Aluminum Shaft Rocker Arm System

The Jesel KPS-505209 Pro Series Aluminum Shaft Rockers are a high-performance valvetrain upgrade, initially developed for the NASCAR circuit and now available for select applications. Constructed from a custom blend of shotpeen-finished 7000 series aluminum, these rockers are built to withstand the rigors and elevated temperatures of endurance racing, offering superior durability and cycle life. The unique dual-diameter modular shaft design is a key feature, allowing for a .562" O.D. shaft bearing which increases the critical bearing strap area to reduce body deflection. This design also accommodates a .750" diameter clamping area and provides ample space for a 7/16" mounting stud, ensuring a secure attachment to the mounting stand. The Pro J2K Series rockers come standard with a .250" needle nose roller and can be optioned with a Tool Steel Ball Adjuster for increased thread area. These rocker arms are specifically designed for Chevy LS engines, including those with CFE cylinder heads and LS3 280cc heads. The rocker arm ratio is available in multiple options, with a 1.7 ratio noted for rectangular port heads. Specific engine applications include L76 (6.0L AFM), L77 (6.0L AFM), LS1, LS2, LS3, LS7, LS9, LSA, L98, and LSX variants. Compatible vehicles span a range of Chevrolet Camaro, Corvette, and Holden/HSV models, primarily from the 2005 to 2017 model years, with specific engine displacements like 6.0L, 6.2L, and 7.0L. Optional upgrades include a Needle Roller Tip for $385.00 and ARP 2000 Stand Bolts for $100.00. Buyers should note that this product is sold as a single unit and may require specialized fitting and additional parts, as per the manufacturer's disclaimer. It is the purchaser's responsibility to ensure suitability for their specific application.