"New" MSD Direct Fit Spark Plug wire set for Mercruiser 600/700 SCi Replaces Mercruiser #84-899330A09 and 84-899330A10
This MSD spark plug wire set has been custom built to replace the stock inferior OEM wire set found on Mercruiser's 600/700 SCi series of engines. Each spark plug wire is 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.