Just the fact that the S&S polished billet rocker covers for Shovelheads look so good may be reason enough to put them on your bike, but the beauty is not just skin deep. The well thought out design offers a number of advantages over conventional cast rocker boxes. Machined from billets of 6061-T6511 aluminum on modern CNC machining centers, these rocker boxes provide the ultimate in dimensional accuracy and stability. The top and bottom sections of the covers are sealed with an o-ring type Viton seal that insures leak free operation. This two-piece design also allows, dependent of what kind of frame you have, installation and removal with the engine in the frame. These rocker covers are clearanced for up to .590" valve lift when used with S&S roller rocker arms. Rocker shafts used in the S&S Shovel style rocker boxes are an economical straight design similar to Evolution rocker shafts. Anyone who has had to replace a set of stock Shovelhead rocker shafts can tell you that this will save you money when it comes time to rebuild the top end. Supplied in sets of two complete rocker boxes with special O-rings, required hardware, and 4 rocker arm shafts. Use with stock style rocker box to cylinder head gaskets.
Note: These replacement parts only fit S&S rocker boxes, can not be used in OEM and stock style covers.