True Fire Ignition System. Hidden from view when installed. Designed to fit into an orginal early heinze coil box. 12 volt. New fully electronic, multi spark, ignition system. Replaces your 4 coils and timer roller. Slides into your original coil box and is hidden from view. Rotor and sensor module is hidden inside of original timer case. Unit has a simulated buzzing sound. Doesn't require any maintenance and has one moving component that triggers the main module. Easily installed in minutes, just remove your old coils and swap them with our single unit coil module. Remove your timer and roller then install our rotor and sensor module inside your timer housing. Designed to operate only on twelve volt systems.