This high performance gear reduction is designed for 1958-96 Chevrolet V8 and all V6 90 degree engines (200,,229,and 4.3L). Its compact starter delivers plenty of torque and is a small package which offers increased clearance for extended oil pans and headers exhaust systems. This lightweight (10.5 pound) and powerful (1.2 kilowatt output) starter relies on a 3.75:1 gear reduction to spin a high-compression engine.This mini starter has a red Chevrolet Bow Tie logo and dual bolt pattern for 12 3/4 " (153 tooth) and14" (168 tooth) flywheel. Mounting bolts and shims, gaskets and electrical connectors are included . This unit can be rotated to clear most exhaust systems. This starter is not recommended for competition.