MSD 8.5mm Super Conductor Spark Plug Wire Set — 8.5mm Black, Low Resistance & EMI Suppression

MSD 35593 is an 8.5mm black Super Conductor spark plug wire set engineered to deliver low-resistance ignition delivery and strong EMI suppression for street and performance engines.

This wire set combines a low electrical resistance design, a heat- and abrasion-resistant outer sleeve, and a high-tensile core to maintain reliable spark transfer under demanding conditions. MSD’s construction uses a densely wound conductor, ferro-magnetic impregnation for an EMI choke effect, and Dupont Kevlar reinforcement inside a proprietary jacket. The result is wires that keep ignition energy focused at the plug while resisting heat, vibration, and interference that can affect engine management systems and electronics.

How does this wire set improve ignition performance?

The 8.5mm conductor measures less than 50 ohms per foot, minimizing energy loss between the ignition source and spark plug. Low resistance helps maintain consistent spark delivery across RPM ranges, improving ignition reliability compared with higher-resistance aftermarket wires.

• Less than 50 ohms per foot for reduced energy loss
• Densely wound conductor: forty feet of conductor wound into one foot of wire
• Ferro-magnetic impregnation creates an internal EMI choke
• Suitable for high-output coils and ignition systems

What features protect the wires from heat and wear?

The outer sleeve is a proprietary compound formulated to resist high temperatures and abrasion common near headers and engine fixtures. Internally, the Dupont Kevlar core increases tensile strength so the wires resist stretching and breakage during installation and operation.

• Durable outer jacket designed for heat and abrasion resistance
• Kevlar-reinforced conductor core for enhanced tensile durability
• Robust assembly that stands up to vibration and frequent handling

How does the design reduce electromagnetic interference (EMI)?

MSD’s Super Conductor construction uses a high-density winding pattern and ferro-magnetic impregnation to form an effective EMI choke that suppresses interference radiated from the ignition circuit. That helps protect on-board electronics and sensors from ignition noise.

• Forty-foot conductor wound tightly into each foot for high suppression
• Ferro-magnetic impregnated core provides choke action against EMI
• Compatible with modern engine control and sensor systems

Which vehicles and applications are these wires suited for?

These 8.5mm Super Conductor wires are a common choice for performance street cars, muscle cars, and many aftermarket ignition upgrades where reduced resistance and EMI suppression are priorities. They work well with both stock and upgraded ignition coils, provided the physical length and terminal fit match the application.

• Ideal for street and performance gasoline engines requiring 8.5mm wires
• Works with stock or high-output ignition coils when fitment matches
• Recommended when EMI suppression and low-ohm performance are desired

Who is this for: Drivers and mechanics who need a robust, low-resistance spark plug wire set that balances performance and durability. Choose the MSD 35593 if you want strong EMI suppression, a heat-resistant jacket for demanding engine bays, and a Kevlar-reinforced core to withstand installation and long-term use. Verify wire lengths and terminal compatibility for your specific engine and ignition setup before purchase.