MSD Pro-Cap - Fits MSD Pro Mag Only Underwear Top Simpson's DNA products are designed

Simpson's DNA products are designed with athletic performance-enhancing features engineered to reduce weight and driver restrictions

3/16 in Bore

While other gauges have 14 or more moving parts

oval track and turbocharged (extreme heat) applications

Power Steering Box

MSD Pro-Cap - Fits MSD Pro Mag Only Underwear Top Simpson's DNA products are designedTo go with the huge power of the Pro Mag 44, MSD developed a huge cap and rotor, the Pro Cap! The Cap has a big 5" terminal to terminal diameter which ensures spark delivery and prevents the chance of spark scatter occurring inside the cap. The entire assembly is injection molded from Dupont(R) Rynite? material for incredible strength and high dielectric properties. The Rotor features a deep skirt and thick vanes to stir up the air and even the rotor