MSD 31243 Super Conductor 8.5mm Spark Plug Wire Set Black SB Chevy Low Profile Distributor

The MSD 31243 Super Conductor 8.5mm Spark Plug Wire Set is a race-tailored ignition wire set engineered specifically for Small Block Chevy engines equipped with headers or a low profile MSD distributor. Delivering the ideal balance of ultra-low resistance and maximum EMI suppression, this set represents the pinnacle of performance spark plug wire technology.

At the core of the Super Conductor design is a copper alloy conductor wound helically around a ferro-magnetic impregnated center core. This precision winding packs over 40 feet of conductor into every single foot of finished wire — achieving less than 50 ohms of resistance per foot while delivering RFI suppression equivalent to a 1,500-ohm wire. The result is more spark energy reaching the plug where it belongs, without electromagnetic interference disrupting sensitive vehicle electronics.

Key Features:

• Ultra-low resistance: Less than 50 ohms per foot — the lowest resistance of any helically wound performance wire
• Superior EMI suppression: Ferro-magnetic impregnated center core combined with helical winding creates a highly effective EMI choke
• 40+ feet of conductor per foot: Tightly wound copper alloy conductor maximizes conductivity and suppression simultaneously
• 8.5mm construction: Heavy-duty synthetic/silicone outer jacket over an extra-heavy glass braid and dielectric insulator for reliable current delivery
• 90-degree plug boots: Designed for race engines with headers and low-profile distributor fitment on Small Block Chevy V8 applications
• Dual crimp stainless steel terminals: Snap-lock design ensures a secure, vibration-resistant connection under high-temperature boots
• Dupont Kevlar-reinforced conductor core: Provides exceptional tensile strength to resist stretching or tearing during installation and use
• Abrasion and heat-resistant outer sleeve: Proprietary compound construction withstands extreme underhood temperatures and physical wear
• Includes clip-on cylinder number markers for easy wire identification
• Sold as a complete set

The MSD 31243 Super Conductor wire set is the go-to choice for performance builders who demand maximum ignition efficiency without electronic interference. Whether building a street/strip machine or a dedicated race engine, these wires deliver proven, race-grade performance with a clean black finish.