*** IN STOCK SHIPS TODAY *** Made from billet alum. black anodized then 360 degree marks are cut to allow the racer to set timing, adjust valves, etc. The degree ring measures 6.375" in dia. and can only be used with RCD's dovetail six spline design.
Degree ring is .250" thick with .025" step on the backside to sit down over the crank hub.