Ensure that you have the finest distributor cap available by using one of these MSD Extra Duty distributor caps. Theyre designed with performance in mind, are molded from a high-quality, voltage-insulating material, and use low-resistance terminals for maximum conductivity. Founded in 1970 MSD, LLC is the leader in performance ignition components todays racers need to step up their vehicles performance. MSD has completely redefined the ignition system by using cutting-edge technology called capacitive discharge (CD) that makes it possible to spark multiple times. The pioneer in research and development of high-performance ignition systems, the company offers the finest parts, including ignition controls, distributors, coils, timing accessories, spark plug wires, and more. Every product that leaves the state-of-the-art MSD factory is rigorously tested to deliver flawless quality and push the performance to the max while improving starting and ensuring smooth idle. Thats why MSD is the number one ignition choice for performance fanatics and hardcore racers in NHRA, IHRA, NASCAR, World of Outlaws, DIRT, SCORE, IDBA, and many more.