MSD 31593 Super Conductor 8.5mm Spark Plug Wire Set Black Small Block Chevy Socket

The MSD 31593 is an 8.5mm Race Tailored Super Conductor spark plug wire set engineered for high-performance Small Block Chevy engines running headers or an MSD distributor. Wires are custom cut to route cleanly behind the block and under the headers, keeping the engine bay tidy while protecting the wires from heat sources and contact with engine components.

At the heart of the Super Conductor design is a copper alloy conductor that delivers less than 50 ohms of resistance per foot — the lowest resistance of any helically wound wire available. Less resistance means more spark energy reaches the plug to ignite the air/fuel mixture more completely.

The conductor is wound extremely tight around a special center core — over 40 feet of conductor per foot of finished wire. Combined with a ferro-magnetic impregnated center core, this winding procedure creates an extremely effective EMI choke that suppresses electromagnetic interference and keeps RFI contained inside the wire, away from sensitive electronics.

The conductor assembly is protected by a proprietary outer sleeve made from a silicone and synthetic material blend, providing strong resistance to high heat, abrasion, and tears. Each wire end is secured with MSD's Dual Crimp Terminals, which feature two separate crimps — one gripping the sleeve, one gripping the conductor — for a rock-solid connection. Distributor boots are 90° socket-style (female), and spark plug boots are 90°.

Key Features:

• 8.5mm Super Conductor wire construction
• Less than 50 ohms resistance per foot — lowest of any helically wound wire
• Copper alloy conductor for maximum energy transfer to the spark plug
• Over 40 feet of tightly wound conductor per foot of wire for superior EMI suppression
• Ferro-magnetic impregnated center core creates an effective electromagnetic interference (EMI) choke
• DuPont Kevlar-reinforced conductor core for increased tensile strength
• Proprietary silicone/synthetic outer sleeve resists high heat, abrasion, and tearing
• Dual Crimp Terminals for a secure, reliable connection at both ends
• 90° socket-style (female) distributor boots; 90° spark plug boots
• Race tailored fit — wires route below header/exhaust manifold
• Black jacket finish
• Legal for emissions-controlled, uncontrolled, and racing use vehicles

The MSD 31593 Super Conductor wire set delivers race-proven performance for Small Block Chevy builds, offering the ideal combination of ultra-low resistance and maximum EMI suppression in a durable, custom-fit package.