Manufacturer: Feuling MPN: 4077 Title: Standard Adjustable Pushrods Size: .095in Wall Thickness 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" Can be used with hydraulic or solid lifters and street or race engines Fueling pushrods can be used with factory pushrod tubes Made in the U.S.A.