Sierras 18-5397 Distributor Cap is designed for use with Ford 2.3L engines with a Mallory Distributor (1987-1990). The cap comes with (1) Sierra 18-5399 Distributor Cap Gasket. It is interchangeable with CDI E64-0015, Mallory 9-29418, and OMC Stern Drive 985218. Each Sierra product meets or exceeds the original equipment part it replaces.