One of the first requirements when installing a Steel Roller Cam is the addition of a bronze distributor Gear. A stock cast iron distributor Gear is not compatible with a Steel Camshaft Gear. COMP Cams Gears are machined from AMPCO-45 extruded aluminum bronze with 5% Nickel added. These Gears feature a high-strength tooth design that resists wear even when used with high pressure oil pumps. Chevrolet-V6 90&deg