This special performance single roller design timing chain kit can be used on all 1987 and newer small block engines with roller lifter camshaft, except LT1, LT4, and 1997 and later LS1. This kit is quieter than the double roller chain. This kit includes the following components: camshaft sprocket P/N 12552129, crankshaft sprocket P/N 14088784, chain P/N 14088783, retainer P/N 10168501, retainer P/N 10088128, three bolts P/N 9424877, and two bolts P/N 14093637. Use these components for single service requirements. They will not work on flat tappet camshafts