Sierra 18-8803-2 Spark Plug Wire Set - 8 Cylinder Sierra Spark Plug Wire Set Meets or exceeds the original equipment quality Sierra part number: 18-8803-2 Interchangeable with the following: Mallory 9-28000, 9-28010, 9-28012, 9-28021, Mercruiser 84-43376A9, Mercury 84-816761Q9, 84-816761A9, 84-813720A10, 84-813720A9, 84-816761Q10, OMC 503752, 503755