MSD molds our most popular V8 distributor caps in-house. These caps are injection molded from DuPont(R) rynite material and feature spark plug-style terminals. These terminals offer improved locking connections and the rynite material is extremely strong. Product Features:Designed w/Performance In MindHigh Quality; Voltage Insulating MaterialUsed For PN[8570/8545/8546]BlackStainless Terminals