The Chevrolet Performance LT1/LT4 Timing Chain Set features extreme duty components for 1995 through 1997 model ''Gen II'' LT1 and LT4 engines. To convert 1993 and 1994 engines, you must use camshaft 809-10224242, distributor 809-1104032, timing cover 809-12552426, vac harness 809-12554395, and vac fitting 809-14082470. Included in this kit are steel gears (water pump gear), a camshaft sprocket, crankshaft sprocket (809-14088784), and timing chain (809-14088783). To be used with pin drive camshaft only. These parts are not the production replacement components, they are extreme duty and a great performance upgrade!