MSD 31353 Super Conductor 8.5mm Spark Plug Wire Set Black Small Block Chevy HEI

The MSD 31353 Super Conductor 8.5mm Spark Plug Wire Set is a custom-fit, performance ignition wire set engineered specifically for Small Block Chevy engines with HEI distributor caps. Designed with MSD's signature helically wound core technology, these wires deliver maximum spark energy with industry-leading EMI suppression in a sleek black jacket.

Key Features:

• Ultra-Low Resistance: Just 40–50 ohms of resistance per foot — the lowest of any helically wound wire — for superior spark energy delivery
• 40 Feet of Conductor Per Foot of Wire: Tightly wound copper alloy conductor around a ferro-magnetic impregnated center core creates an effective EMI choke, keeping interference inside the wire and away from vehicle electronics
• 8.5mm Jacket: Tough synthetic/silicone outer jacket over an extra-heavy glass braid and dielectric insulator protects against extreme heat and abrasion
• 90° HEI Distributor Boots: Silicone 90° boots and terminals designed for HEI (male post) distributor caps route cleanly over the valve covers
• 90° Spark Plug Boots: High-temperature silicone boots at the plug end for a secure, heat-resistant connection
• Dual Crimp Stainless Steel Terminals: Two-point crimp design — one for the wire sleeve and one for the conductor — ensures a rock-solid connection that holds up to repeated pit-stop handling
• Clip-On Cylinder Markers Included: Easy wire identification right out of the box
• Coil Wire Included: Coil wire is included but must be assembled and crimped to length
• Wires Route Over Valve Covers: Custom-fit lengths are precut for a clean, over-the-valve-cover routing path

The MSD 31353 wire set combines RFI suppression equivalent to a 1,500-ohm wire with the conductivity of a near-straight-wire connection, ensuring every volt generated by your ignition system reaches the spark plugs. The result is stronger, more consistent spark and improved combustion efficiency. Whether you're building a street performance engine or a dedicated weekend racer, these wires deliver the reliability and performance MSD is known for.