Pro Shaft Rocker Kit LS3 1.70/1.70 AFR Mongoose

The Pro Shaft Rocker Kit LS3 1.70/1.70 AFR Mongoose is a high-performance rocker arm assembly engineered for serious LS3 engine builders and track enthusiasts. This precision-machined component transforms cylinder head performance by optimizing valve lift and duration characteristics on AFR (Air Flow Research) Mongoose cylinder heads. Designed for competitors, drag racers, and street performance builders who demand maximum efficiency from their LS platform powerplants, this kit addresses the critical need for reliable, geometrically optimized valve actuation in high-RPM applications.

The 1.70/1.70 rocker arm ratio is specifically calibrated to deliver optimal valve overlap and lift characteristics across the RPM band when paired with AFR Mongoose heads on an LS3 platform. JESEL's Pro Shaft design utilizes precision-ground shafts and hardened steel rocker arms with needle roller bearings that minimize friction and ensure consistent valve actuation even under extreme load conditions. The equal 1.70-to-1 ratio on both intake and exhaust sides provides symmetrical valve timing benefits, enhancing combustion chamber scavenging and reducing parasitic losses—critical factors in boosting horsepower and torque output in turbocharged, supercharged, or naturally aspirated applications.

Engine builders integrating this Pro Shaft Rocker Kit with AFR Mongoose heads on LS3 platforms will experience improved valve control and repeatability across consecutive heat cycles, making it ideal for road course racing, circle track, and bracket racing environments. Installation requires proper valve lash adjustment and verification of pushrod length to ensure correct geometry; professional installation is strongly recommended. At 15.84 lbs, this complete assembly offers a balance of durability and weight efficiency, making it suitable for both street performance builds seeking reliability and competition engines where every fraction of a horsepower counts.