MSD Super Conductor 8-Cylinder Spark Plug Wire Set — Black 8.5mm, Cut-to-Fit with Multi-Angle Boots

MSD 31193 is an 8-cylinder, universal 8.5mm Super Conductor spark plug wire set in black that includes multi-angle boots, a 32" coil wire and a Mini-Stripper-Crimper so you can cut and fit wires to most engines.

Whether you're rebuilding a classic V8 or upgrading a street/strip powerplant, the MSD 31193 wire set supplies long 8.5mm conductor cores and a selection of boots and terminals for flexible routing and reliable electrical connection. The kit is sold as a universal, cut-to-fit solution: wires arrive longer than many OE sets so you can trim to exact lengths and choose the proper boot orientation for tight engine bays.

How do these wires fit different engine layouts?

The set is designed for universal compatibility across most 8-cylinder engines by providing extra-long conductors and both socket-style and spark plug-style boots. You can cut to length and use the included Mini-Stripper-Crimper to terminate wires cleanly for custom routing or non-standard ignition setups.

• Includes wire lengths: two 56", two 50", two 42", two 32" and one 32" coil wire
• Extra-long 8.5mm cores for trimming to fit
• Multiple boot styles and terminal options for various plug/coil layouts
• Multi-angle boots help clear headers, brackets, and accessories

What materials and features make these wires work for high-demand use?

MSD builds these wires with a super conductor core inside an 8.5mm jacket to balance spark delivery with electromagnetic interference suppression. The heavy outer jacket and quality boots resist abrasion and heat exposure found in performance engine bays.

• 8.5mm conductor core for consistent spark transmission
• Durable high-temperature jackets that resist chafing
• Socket-style and straight plug boots to reduce stress at connection points
• Compact coil wire included to match most ignition coil positions

What tools and accessories come with the kit and how do they help installation?

The MSD 31193 set includes a Mini-Stripper-Crimper so you can cut, strip, and crimp terminals on-site for a neat, professional installation. Having the right tool in the box saves time and ensures reliable terminations without needing specialty shop equipment.

• Mini-Stripper-Crimper for precise removal of insulation and secure crimps
• Both socket-style and spark plug-style boots included to adapt to plug and header clearance
• Cutdown-ready wires mean no excess routing bulk or awkward bends
• Clear length assortment simplifies placement and matching to firing order

How do I choose which boot and length to use for my installation?

Start by measuring from each spark plug to the distributor/coil tower or ignition coil. Select a wire slightly longer than the measured distance to allow for routing, then trim and terminate. Choose the boot style that clears nearby components and provides the best seating on the plug and coil tower.

• Measure from plug tip to coil/distributor before cutting
• Use socket-style boots where angled clearance is needed
• Straight plug boots work in tight vertical access points
• Trim gradually and test fit before final crimping

Who is this for? The MSD 31193 Black 8.5mm Super Conductor set is aimed at home mechanics, restoration builders and performance enthusiasts who need a flexible, cut-to-fit ignition wiring solution for 8-cylinder engines. If you value tidy routing, a full set of boot options and on-the-spot termination tools, this kit provides the parts and accessory to finish an installation cleanly without multiple trips to the parts store. It’s especially useful for custom engine swaps, hot-rods, and cars where factory wire lengths or boot angles won’t work.