MSD 31183 Super Conductor 8.5mm Spark Plug Wire Set 8-Cylinder Multi-Angle HEI Universal

The MSD 31183 is a universal 8.5mm Super Conductor spark plug wire set designed for 8-cylinder engines equipped with late-model HEI "spark plug top" distributor caps. This unassembled set gives you the flexibility to cut each wire to your exact desired routing length, ensuring a clean, custom fit on virtually any V8 engine build.

At the heart of the Super Conductor wire is a specially helically wound copper alloy core that delivers just 40–50 ohms of resistance per foot — the lowest resistance 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 for maximum conductivity. A ferro-magnetic impregnated center core works in tandem with the winding to form a highly effective EMI choke, keeping electromagnetic interference contained within the wire and away from sensitive vehicle electronics.

The exterior construction is equally impressive. A tough 8.5mm synthetic/silicone jacket over an extra-heavy glass braid and dielectric insulator keeps current flowing directly to the spark plugs. Underneath the high-temperature silicone boots, dual-crimp stainless steel terminals feature snap-locks for a secure, rattle-free connection.

Key Features:

• 8.5mm diameter spiral-core wire with 40–50 ohms/ft resistance
• Multi-angle silicone spark plug boots and terminals pre-installed on one end
• HEI distributor cap boots and terminals included for custom termination
• Includes Mini-Stripper-Crimper tool for factory-style crimps
• Clip-on cylinder markers included for easy wire identification
• Wire lengths: 2 × 56", 2 × 50", 2 × 42", 2 × 32", plus 32" coil wire (9 wires total)
• Black wire with gray silicone boots
• RFI suppression: Yes
• Coil wire included: Yes
• Sold as a complete set

The MSD 31183 Super Conductor wire set is the ideal choice for performance engine builders who want precise wire routing control without sacrificing ignition performance or EMI suppression. Simply cut each wire to length, crimp the supplied terminals, and enjoy a professional, low-resistance ignition system.