Reaper EVO 543 cam requires performance valve springs, see FEULING # 1120 or 1100, performance lifters recommended but not required. Will work with factory pushrods on engines with factory stack up, if deck height, cylinders or rocker boxes have been modified from stock then adjustable pushrods are required. Increased compression, cylinder head work and performance exhaust recommended but not required, increased compression is required for bottom end performance. RPM range 2,200 - 5,950. Grind: 543
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Fits Harley-Davidson Big Twin 85-99 Evo