Marine Tune-up Kit for Delco-Style EST Inline 4 cyl Replaces Mercruiser part number 811635Q2, OMC part numbers 986643 and 986651. Includes Cap and Rotor. Fits 3.0L, LX GM Engines with Delco distributor. Applications for Indmar, Marine Power, Crusader and Volvo. Color of cap may vary.