MSD has new ignition accessories for Ford and Chrysler Hemi Pro Stock engines. These engines’ heads have a long, skinny tube machined in the head to access the spark plug. This narrow passage makes it considerably difficult to install spark plug wires. MSD answers with a new injection molded spark plug wire boot that reaches down to securely connect the wire to the spark plug. The set of eight includes the tubes and components to assemble the wire for an easy installation.