Jesel KPR38080 Pro Series Shaft Rocker Arm Kit

The Jesel KPR38080 is a high-performance shaft rocker arm kit from Jesel's renowned Pro Series line, trusted by championship-winning racers from NHRA Pro Stock to NASCAR. Designed for serious racing applications, this precision-engineered valvetrain component delivers the performance and reliability demanded by professional engine builders.

Pro Series Features:

• Full complement needle bearing assembly for minimal friction and even load distribution across shaft surface
• CNC-machined, heat-treated H-13 tool steel lash adjusters with nitride coating for enhanced wear protection
• Profiled rocker tail and clipped-pin nose roller design for optimized geometry and reduced moment of inertia
• Shot-peened surface finish for superior fatigue resistance and extended service life
• Precision ground and heat-treated tool steel shaft for years of durable performance
• Fully rebuildable to Jesel factory specifications through their CPR department

Jesel Pro Series rocker systems are engineered with advanced FEA analysis to minimize deflection and maximize valvetrain stability at high RPM. Each kit includes precision-machined rocker stands and ARP mounting hardware to provide a stable, rigid mounting surface. Ideal for naturally aspirated, turbocharged, supercharged, and nitrous-injected racing engines where precision valvetrain control is critical.