MACE STANDARD TIMING CHAIN KIT TO SUIT HOLDEN CALAIS VT VX VY VZ LS1 5.7L V8Mace timing chain sets are designed for use with stock cams. They have a solid bushing chain for a true bearing surface that rolls with the sprockets, eliminating chain stretch. This timing kit includes a stock replacement crank sprocket with a single keyway. Contents: 1 X 3 bolt single trigger cam sprocket 1 X Single keyway crank sprocket 1 X Roller chain Vehicle Fitment Guide Note: This timing chain set is not for use above 6,500 rpm.