This pigtail provides for the majority of the connections between the FAST E7 Ignition system and the tachometer distributor crank trigger and other components.; Edelbrock products offer improved performance and aesthetics for a broad array of vehicles and engines. 'Proven performance' is the philosophy by which Edelbrock was founded and it continues to this day with the highest standards for performance and quality. Edelbrock core products are engineered manufactured and tested in the USA to ensure the best quality possible. This is further backed by some of the best warranties in the industry and a highly qualified technical support staff.; High energy sparks to handle extreme compression boost or nitrous.