MSD 84039 HEI Coil Wire 8.5mm Super Conductor Red 18in Blaster 3

The MSD 84039 is an 18-inch 8.5mm Super Conductor HEI coil wire designed for use with MSD Blaster 2 and Blaster 3 ignition coils in HEI-style ignition systems. Built with MSD's proven Super Conductor wire technology, this replacement coil wire delivers maximum spark energy with minimal resistance and zero electronic interference.

MSD's 8.5mm Super Conductor wire features a specially helically wound core that achieves only 40–50 ohms of resistance per foot — the lowest of any helically wound wire — while providing RFI suppression equivalent to a 1,500-ohm wire. Each foot of finished wire contains 40 feet of tightly wound copper conductor, and a ferro-magnetic impregnated center core creates an effective EMI choke that keeps interference contained within the wire and away from sensitive vehicle electronics.

A tough 8.5mm synthetic/silicone jacket over an extra-heavy glass braid and dielectric insulator protects the wire and guides current efficiently. Dual crimp stainless steel terminals with snap-lock design are installed under high-temperature 90° HEI boots on both ends for a secure, rattle-free connection.

Key Features:

• 18-inch length with 90° HEI-style terminals and boots on both ends
• 8.5mm Super Conductor spiral core wire construction
• Ultra-low resistance: 40–50 ohms per foot
• RFI/EMI suppression equivalent to a 1,500-ohm wire
• Ferro-magnetic impregnated center core for effective EMI choke
• 8.5mm synthetic/silicone jacket over extra-heavy glass braid
• Dual crimp stainless steel terminals with snap-lock feature
• Includes Power Tower adapter for socket-style distributor caps (e.g., MSD PN 8437)
• Red color finish
• Legal for use on emissions-controlled, non-emissions, and race-only vehicles

Installation Note: The included Power Tower adapter is not compatible with Blaster 2 Series Coils, including the High Vibration Coil. It is intended for use with socket-style caps such as MSD PN 8437.