GLM Cap & Rotor Kit. Made for use with Delco EST (Electronic Spark Timing) 4 Cyl. Refer to manufacturer recommendations for proper fit/installation information. Features of GLM 71830 Cap & Rotor Kit Made from quality materials Fits Mercruiser/OMC/Volvo Penta Ignition distributor cap and rotor kit Refer to manufacturer recommendations for proper installation/fit information Designed for use in marine environments Package Contents: GLM 71830 Cap & Rotor Kit GLM 71830: Cap & Rotor Kit