Reaper Camshaft - 580 Series - Buell | XL (except RH Sportster)Designed for riders who want more horsepower and the powerband higher in the RPM range Higher compression also recommended, along with performance pushrods and lifters High flow intake and performance exhaust required Rpm range: 2400 6900+ Overlap: 42 Made in the USA Requires high lift valve springs see Fueling Beehive Econo, Endurance or High Load valve springs. Most cam compartments will need to be machined to make clearance for 580 High Lift cams.