"New" MSD Direct Fit Spark Plug wire set for Mercruiser 850SCi/1075SCi/120SCi
This MSD Performance spark plug wire set is designed as a upgrade to replace the stock factory OEM wire set found on Mercury Racing 850SCI, 1075SCI, and 1200SCI Supercharged engines. Each spark plug wire is custom tailored and manufactured from MSD 8.5MM Helicore performance wire and provides 10X the spark energy of OEM wire sets. By delivering more spark to the spark plug efficiency and performance are achieved. Replaces #84-842393A03 and #84-842393A04