Product Feature: Direct fit for GM application utilizing the 4-pin ignition module(1974—1985) Full CNC machined aluminum body. 65K high voltage coil, upgrade for racing application. Brass terminals. less contacting resistance. Heavy duty construction, high grade hardened steel gears. Spec’d by Bravex racing engineers. Including coil and module. Vacuum advance for economy. Provide consistent ignition over 9000 RPM. Compatible: It is a new HEI distributor for small block/big block Chevys. .