At last true custom fit spark plug wire sets for Mercruiser and Mercury Racing Hi Performance engine applications. It seems for years as a performance power boater your only options were universal wire sets you spent ours building yourself or the standard oem set which wouldn’t perform as desired. You can now buy exact fit MSD Heli-Core 8.5MM direct-fit spark plug wire sets for the 496, 496MAG, 525EFI, 565EFI, 600SCI, 700SCI, 850SCI, 1075SCI, and 1200SCI engine applications.

These Spark Plug wire sets offer MAXIMUM spark energy delivery to your engines spark plugs. They are hand crafted, numbered, and include all OEM style wire separators.

The MSD 8.5mm Super Conductor Wire is THE performance wire. Engineered from the inside out, incredibly low resistance without electronic interference! In a single 12 inch length of Super Conductor Wire there is only 40 – 50 ohms of resistance! That is the lowest resistance of any helically wound wire. The low resistance results in less loss in spark energy so more reaches the spark plug. A proprietary blend of silicone and synthetic material produce a sleeve that is highly resistant to high heat as well as abrasion and tears.

Sold Exclusively on the West Coast by CP Performance and on the East Coast from KE Performance.