A complete tune-up kit! This comprehensive ignition package is intended to improve ignition accuracy, fuel economy, starting, and throttle response in street/street applications. 50 state legal kit includes HEI distributor cap, rotor, custom-fit spiral core 8mm Blue Max spark plug wire set and wire loom kit. Fits 74 and newer Chevy V8 with HEI ignitions (except with centerbolt valve covers).