This is mainly used in racing engines. These gears give the engine less resistance by the straight teeth. There are two types available, with fixed mounting like the original gear and copy what some degrees rotatable relative to the camshaft. After the removal of the oil pump, the camshaft can be adjusted with a maximum of 4 degrees before or after by means of the supplied degrees slices. This set includes: camshaft sprocket, crankshaft sprocket, degrees slices, and the required camshaft sprocket bolts. The solid model consists of the camshaft sprocket, crankshaft sprocket and mounting bolts. When adjustable camshaft sprocket is recommended the camshaft retaining rings to use instead of the supplied knurled washers.)