MSD 31153 Universal Super Conductor Spark Plug Wire Set - 4-Cylinder 8.5mm Black

The MSD 31153 is a universal 8.5mm Super Conductor spark plug wire set designed for 4-cylinder engines. This set gives you the flexibility to custom-cut each wire to the exact length needed for your application, ensuring a clean, precise installation without excess wire.

Superior Conductivity & EMI Suppression:

At the core of every Super Conductor wire is a copper alloy conductor wound over 40 feet tight into every single foot of wire, delivering an industry-leading resistance of just 40–50 ohms per foot—the lowest of any helically wound performance wire. This ultra-low resistance means less spark energy is lost in transit, delivering a hotter, more consistent spark to each plug. The helically wound core, combined with a ferro-magnetic impregnated center core, creates a highly effective EMI (electromagnetic interference) choke that keeps interference contained within the wire and away from sensitive vehicle electronics.

A tough 8.5mm synthetic/silicone outer jacket over an extra-heavy glass braid and dielectric insulator provides excellent resistance to heat, abrasion, and tearing under demanding conditions. Dual-crimp stainless steel terminals beneath high-temperature boots ensure a secure, reliable connection at every plug.

Key Features:

• Universal fit for 4-cylinder engines — cut wires to your desired length for a custom installation
• 8.5mm Super Conductor wire with only 40–50 ohms resistance per foot — lowest of any helically wound wire
• Over 40 feet of copper alloy conductor wound into every foot of wire for maximum conductivity
• Ferro-magnetic impregnated center core suppresses EMI without sacrificing spark output
• Includes both socket-style (early type) and HEI spark plug-style (late type) distributor cap boots and terminals
• Multi-angle spark plug boots pre-installed; straight boots bendable up to 45° for header and tight-clearance applications
• Wire lengths included: (1) 30", (2) 36", (1) 40", coil wire 32"
• Includes Mini-Stripper-Crimper tool for custom termination
• Clip-on cylinder markers included for easy identification
• Durable 8.5mm silicone/synthetic jacket resists heat, abrasion, and tearing

Whether you're building a custom street machine or a dedicated race car, the MSD 31153 Super Conductor universal wire set gives you the performance and flexibility to route your ignition wires exactly where you need them — with no compromise in spark delivery.