MCS-512493 - Compatible with stock or S&S rocker boxes. Rocker arm ratio 1.50 (stock Shovel 1.43 ratio). Forged from 4140 steel; heat treated and shot peened for additional strength. Options note: Can be oiled through the pushrods (Evo style) when used with special

Fitment:
66-84 Shovelhead; S&S SH-series engines; S&S P-series (Panhead style) engines