Billet Crankshaft Sprocket Has Three Keyways for +/- 4 Degrees Adjustability, Both Billet Steel Sprockets are Heat Treated for Durability, TRUE Roller 0.250" Roller Diameter Chain for Reduced Friction, Includes Captured Needle Camshaft Sprocket Thrust Bearing to Minimize Block Thrust Surface Friction, 3-Piece Sets Hand-Matched to Qualify the Correct Center Distance and Minimize Runout.
