TSP HEI Distributor has everything you need, all under one cap. With a highquality aluminum housing and hardened steel dual bushing construction, it is built to last. It features fully adjustable mechanical and vacuum advances, meaning precision is a breeze. It has a highoutput module, highspark 65,000 volt coil, solid brass terminals, and an easy onewire hookup.This distributor is designed for a 12 volt electrical system with an alternator. It is not compatible with a generator and cannot be used with a ballast resistor Packed with design and build features, our HEI distributor offers a whole lot of bang for your buck. Specifications. Color Polished. Housing Material Aluminum. Housing Finish Polished. Housing Style BallMilled. Mirror Shape Rectangle. Mirror Width 8 1/4. Weight 16 lbs