Quieter and smoother engine operationIncreases oil pressure, scavenge volume and engine oil flow15°-35° cooler engine temperatures 15°-30° cooler oil temperatures15-30 more PSI of oil pressureEliminates wet sumping, blow by and oily air cleanersHeavy duty .165'' wall one piece pushrod reduces valvetrain harmonics and increase valve liftResponds well with slip-on mufflers and/or a complete exhaust system and high-flow air cleanerResponds well with increased bore and/or compressionLifters have a full 0.200 of total travel designed with a slower bleed down rate to handle heavy valve spring pressures, increase engine RPM before valve float and feature increased roller clearance for steep ramped camshafts and clearance for the front exhaust camshaft lobe flangeKit includes: Race Series® high volume oil pump, High Flow billet camplate, Reaper Series® camshaft, fulll-travel Race Series® hydraulic roller lifters, fixed length pushrods, Timken/Koyo cam bearing, rocker arm studs and nuts, gaskets, O-rings, ARP® cam/crank fasteners, washers, moly lube and Loctite®Made in the USANot for '23-'24 models with 121'' VVT motors.