The Sierra 18-5385 Distributor Cap is built with precision. Designed to be interchangeable with the following: Chris-Craft 16.69-00052, GLM 71540. Evinrude/Johnson 380541, Mallory 9-29401, Mercruiser 393-9459Q1, 393-9459, 393-9549T, 33667, FI6900052. Each Sierra product meets or exceeds the original equipment part it replaces.