Sierra's 18-5429 Rotor is designed for use with select Chris-Craft 283F/327F (Corvette Engine) (8 Cylinder) (1963-1971), Chrysler M318X (8 Cylinder) (1965-1966), and Crusader 185/230/250/280 (8 Cylinder) (1962) inboard ignition systems. Includes one rotor per package. It is interchangeable with CDI E65-0012, Chrysler Inboard 2098611, and Mallory 9-29213. Each Sierra product meets or exceeds the original equipment part it replaces.