MSD Super Conductor 8.5mm Spark Plug Wire Set for Small Block Chevy — Red, HEI High-Suppression

The MSD 35599 Super Conductor wire set is an 8.5mm, red, high-suppression spark plug wire kit engineered for small block Chevy engines using an HEI cap.

This wire set pairs MSD engineering with heavy-duty materials to control electromagnetic interference (EMI) while delivering low-resistance spark delivery for performance street and race applications. Built with a ferro-magnetic impregnated core wound from forty feet of conductor into a single foot of cable, the 35599 minimizes noise that can affect ignition systems and onboard electronics. The outer jacket uses a proprietary compound for abrasion and heat resistance, and a Dupont Kevlar-reinforced conductor core increases tensile strength for durability during installation and use.

How does the MSD 35599 reduce interference with modern electronics?

MSD’s Super Conductor design focuses on EMI suppression by combining magnetic materials and tight conductor winding. The ferro-magnetic impregnation and dense conductor winding form an effective choke to limit radiated noise that can interfere with ignition and vehicle electronics.

• Ferro-magnetic impregnated core forms an EMI choke
• Forty feet of conductor wound into each foot for high suppression
• Maintains low radiated noise near HEI and aftermarket electronics

What performance characteristics should I expect from these 8.5mm wires?

The wires deliver a low-resistance path for high-voltage spark while balancing suppression and conductivity. With less than 50 ohms per foot, the set supports strong spark energy transfer to the plugs without excessive loss, suitable for performance ignition systems and stock replacement.

• Under 50 ohms per foot for efficient spark transfer
• 8.5mm diameter for a balance of suppression and power delivery
• Compatible with high-output and HEI-style distributors

What materials and construction make the MSD 35599 durable?

Durability comes from a combination of a proprietary outer sleeve and a Kevlar-reinforced conductor core. The outer jacket resists heat and abrasion commonly found in engine bays, while the Dupont Kevlar in the conductor increases tensile strength for repeated routing and removal.

• Durable outer sleeve resists high heat and abrasion
• Conductor core includes Dupont Kevlar for tensile strength
• Robust terminals and insulation engineered for engine bay environments

Will these wires fit my Small Block Chevy with an HEI cap?

Yes — the MSD 35599 is specified for small block Chevy applications and designed to interface with HEI distributor caps. The set’s length and terminal design match common SBC layouts, making installation straightforward on compatible engines.

• Designed for Small Block Chevy usage patterns
• Terminals compatible with HEI-style distributor caps
• Red finish for visual identification and styling

Who is this for? The MSD 35599 Super Conductor 8.5mm wire set is best suited for performance-minded DIYers, engine builders, and restorers who run small block Chevy engines with HEI distributors and want a durable, low-resistance wire set that controls EMI without sacrificing spark delivery. It’s also a good choice for anyone replacing aging wires who needs improved suppression, stronger mechanical durability during routing, and an OEM-compatible fit. While engineered for performance use, the set remains appropriate for daily-driven muscle cars and street rods where reliable ignition and reduced electrical noise matter.