MSD - The set of eight includes the tubes and components to assemble the wire. 9 in Length - 475

9 in Length - 475 lb/in Spring Rate - Front - Steel - Silver Powder Coat - Each

This bolt-on stainless steel system features a 3

25 in Diameter - 4

1 - Pull Down Adjust - Left Side Steel Ratchet Adjuster - Bolt-In / Wrap Around - Individual Harness - Black - Kit

MSD - The set of eight includes the tubes and components to assemble the wire. 9 in Length - 475Ford and Chrysler Hemi Pro Stock heads have a long, skinny tube machined in the head to access the spark plug. This created a challenge to install spark plug wires. MSD answers with an injection molded spark plug wire boot that reaches down to securely connect the wire to the spark plug.