MCS-503591 - .500" valve lift. Bolt-in; good torque. 74" to 89" with 9:1 to 10.5:1CR and 89" to 100" with less than 9.5:1CR. Used with solid or hydraulic lifters with adjustable pushrods. Clearance checks recommended. Note 1: Will fit 00-up models when a 91-99 XL st

Fitment:
91-99 XL. 00-21 XL with 91-99 XL style pinion gear.