Feuling 574 Cam For Harley Performance valve springs are necessary for the Reaper EVO 574 cam. Although not necessary, performance lifters are advised. Will function with factory pushrods on engines that have factory stack up adjustable pushrods are needed if the deck height, cylinders, or rocker boxes have been changed from stock. While not necessary, enhanced cylinder head work, performance exhaust, and compression are advised for optimal bottom end performance. Features: Aggressive power RPM range 2,700 - 6,200 Increased compression, cylinder head work and performance exhaust recommended but not required Made in the USA 574 Cam Info: Intake open/close 15/45 Exhaust open/close 61/14 Intake duration 240 Exhaust duration 255 Intake lift at TDC .163 Exhaust lift at TDC .143 Intake lobe centerline .105 Exhaust lobe centerline .113.5 Intake Lift .574 Exhaust Lift .574