FEULING OIL PUMP CORP. Adjustable Pushrods - Twin Cam 4065

Maintains maximum valve lift; increases stiffness and column rigidity, Maximizes valve-train stability to increase 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, Made from CNC-machined 7/16" tapered 4130 chromoly steel tube; 32 thread per-inch adjustment, Double jam nut lock system, HP+ pushrod wall thickness of 0.095"; Race Series wall thickness of .120", Can be used with hydraulic or solid lifters and street or race engines; "Race" Series recommended when extreme spring pressures are used, Fueling pushrods can be used with factory pushrod tubes, Made in the U.S.A., Require removal of rocker covers and rocker arm supports.