Designed for the Chevy Pro Stock head, these 8.5mm wires incorporate a special boot for the spark plug. Ninety degree boots and terminals are supplied to be installed on the distributor side. Product Features:Extra Long 8.5mm Wires So You Can Cut To Your Designed LengthDistributor Cap - Boots and Terminals IncludedIncludes Mini-Stripper-Crimper For Factory Style CrimpsSize Includes 90 Degree Boots And Terminals