Adjustable Pushrods - Race Series® - Evolution Big twin

Maintains maximum valve lift Increased stiffness and column rigidity maximizing valve-train stability, increasing engine rpm horsepower and torque output Minimal adjustment parameter eliminates flex and loss of valve-train stability problems Individual length intake and exhaust pushrods keep the adjustment extension to a minimum Designed to exceed performance engine needs using larger lift cams and high spring pressures while maintaining proper and critical oil flow to top-end valve gear Double jam nut lock system HP+ Series® pushrod wall thickness of 0.120" and the Race Series® wall thickness of 0.145", both with 24 threads per inch adjustment Fueling pushrods can be used with factory pushrod tubes Made in the USA Can be used with hydraulic or solid lifters and street or race engines. Requires removal of rocker covers and rocker arm supports. Pushrods can be adjusted 0.225" longer than stock to accomodate longer cylinders and smaller base circle camshafts. Race Series® recommended when extreme spring pressures are used. Manufacturer Part Number: 4080