JEGS SSR-III Pro Series RTR Distributors are ready to run with a built-in module and do not require a remote ignition box. The Pro Series distributor housing is CNC-machined forged aluminum for a billet look, while the polished shaft is centerless ground and rides in an upper sealed roller bearing and lower oil-lite bronze bushing. Distributor caps accept male (HEI) spark plug wires. Wiring and connector harness included. Expect years of accurate, reliable operation with performance up to 10,000 RPM.