Sierra 18-5443 Ignition Coil - 4 Cyl, GM V-6 & V-8 Engines With Delco HEI Ignition Sierra Ignition Coil Meets or exceeds the original equipment quality Sierra part number: 18-5443 Fits 4 Cyl., GM V-6 and V-8 Engines with Delco HEI Ignitions Interchangeable with the following: Crusader 7243200, GLM 72113, Mallory 9-29708, Mercruiser 898253T27, 817378T, 817378, OMC 3854002, Volvo Penta 3854002-7, 3854002