MSD 35653 Super Conductor 8.5mm Spark Plug Wire Set Black SB Chevy HEI Tower Cap

The MSD 35653 Super Conductor 8.5mm Spark Plug Wire Set is a custom-fit, vehicle-specific ignition wire set engineered for Small Block Chevy engines equipped with an HEI tower-style distributor cap, with wires routed over the valve covers. Delivering maximum spark energy to the plugs with minimal resistance, this set represents MSD's flagship spark plug wire technology.

At the heart of the Super Conductor design is a tightly wound copper alloy spiral core that achieves only 40–50 ohms of resistance per foot — the lowest of any helically wound spark plug wire. Each foot of finished wire contains over 40 feet of tightly wound conductor, maximizing conductivity while simultaneously suppressing unwanted Electro Magnetic Interference (EMI). A ferro-magnetic impregnated center core acts as an effective EMI choke, keeping interference contained within the wire so it cannot affect radios, sensors, or other on-board electronics.

Key Features:

• 8.5mm diameter wire construction with spiral/helical wound copper alloy conductor
• Ultra-low resistance: only 40–50 ohms per foot — less energy loss means more spark at the plug
• RFI suppression equivalent to a 1,500-ohm wire, protecting sensitive vehicle electronics
• Ferro-magnetic impregnated center core for superior EMI choke performance
• Heavy-duty synthetic/silicone outer jacket over extra-heavy glass braid and dielectric insulator for heat, abrasion, and tear resistance
• 90-degree HEI distributor boots (male post) and 90-degree spark plug boots
• Routed over the valve covers — correct geometry for the application
• Black jacket finish for a clean, professional engine bay appearance
• Sold as a complete 8-wire set, custom cut and terminated for the application
• Legal for use on emissions-controlled and non-emissions-controlled vehicles

MSD backs this product with a one-year warranty against defects in materials and workmanship when purchased from an authorized MSD dealer and installed as intended.