Performance kit for all 1987-and-newer engines with roller lifter camshaft, except LT1, LT4 and LS-Series Includes chain P/N 14088783, crank sprocket P/N 14088784, cam sprocket P/N 12552129, retainers and bolts NOTE: Will not work with flat tappet camshafts or LT1 and LT4 engines