S&S roller rocker arms are forged from 4140 steel, heat treated and shot-peened for additional strength and protection from long-term fatigue. These rocker arms ride on 3/4” wide bushings (stock is 1/2”), and feature a modified lubrication system for unrestricted roller oiling. Because the bushings are wider, we recommend new rocker shafts are used during installation if original shafts show wear in the bushing area. Available for Twin Cam® and EV engines in stock 1.62:1 or higher lift 1.725:1 ratio (modifications required), and Shovel engines in 1.5:1 ratio.
S&S hydraulic tappets have optimized plunger assemblies and metering devises to better withstand forces associated with high lift cams and heavy-duty valve springs. S&S lifters for EV engines incorporate a traditional axle and inner race within the roller assembly.
This simple but effective kit consists of four machined, heat treated and ground spacers that reduce the travel of the hydraulic unit in high RPM situations, thereby eliminating potential collapse of the lifter and its effect on cam timing.
CNC machined billet tappet blocks for ‘86-’90 Sportster® engines. Includes mounting bolts and o-rings. Also used on S&S replacement XL cases that use ‘86-’90 cam geometry; special blocks are also available for use with S&S Special Application cases that have 1/2” offset cam chest.