MSD 8.5mm Super Conductor Spark Plug Wire Kit — 8-Cylinder Universal, Black, Multi-Angle Boots

MSD 31193 is an 8-cylinder, universal 8.5mm super-conductor spark plug wire kit designed to be trimmed to fit, with multi-angle boots and a coil wire for flexible installation.

This kit supplies a complete set of high-performance ignition wires engineered for reliable spark energy delivery in a wide variety of V8 applications. The wires use a thick 8.5mm conductor for strong signal transmission and come with multiple boot and terminal options so you can configure the leads to match your engine’s routing and connector style. A tool is included to help you strip and crimp terminals, and lengths are varied so you can cut each wire to the exact measurement needed.

What wire lengths are included and why do they vary?

The kit contains two 56-inch, two 50-inch, two 42-inch and two 32-inch spark plug wires plus a 32-inch coil lead. These staggered lengths accommodate common V8 firing orders and routing paths, reducing excess slack and resisting crossfire when trimmed properly.

• 2 × 56" wires: for long runners or rear cylinders
• 2 × 50" wires: mid-length routing needs
• 2 × 42" wires: shorter cylinder runs
• 2 × 32" wires + 32" coil: compact front cylinders and coil hookup

How do the multi-angle boots and terminal options help installation?

Multiple boot styles let you choose the best connector orientation for tight engine bays, aftermarket headers, or stock manifolds. The kit includes both socket-style and spark plug-style boots with matching terminals so you can assemble connections that are secure and low-profile.

• Socket-style boots: for coil packs or deep wells
• Spark plug-style boots: standard plug access points
• Interchangeable terminals: adapt to OEM or performance components

What tools and customization features are provided for fitting wires?

An included mini-stripper/crimper lets you prepare and assemble the wires on the vehicle without needing a full shop toolset. The extra-long 8.5mm conductor lets you trim each lead to the perfect length, improving appearance and preventing misrouting.

• Mini-stripper/crimper: strips insulation and crimps terminals
• 8.5mm extra-long conductor: cut-to-fit for custom lengths
• Step-by-step fitment: measure, trim, strip, crimp, install

Will these wires work with my engine and ignition setup?

The set is built as a universal V8 solution and fits many domestic and aftermarket ignitions, but compatibility depends on your coil and plug terminal types and available routing space. Check your coil dimensions and plug recess depth, and choose the included boots and terminals accordingly during assembly.

• Universal V8 coverage: suits many small- and big-block engines
• Confirm coil/plug fit: measure well depth and connector style
• Trim and assemble for a clean, interference-free routing

Who is this for: MSD 31193 is aimed at mechanics, hobbyists and performance enthusiasts who need a versatile, customizable spark plug wire kit for V8 engines. If you prefer to cut wires to length for a neat installation, require multiple boot styles for tight spaces or want a reliable conductor thickness in a universal package, this kit provides the components and toolset to complete the job without sourcing additional parts.