The ACCEL Stealth SuperCoil is the hottest looking and best performing ignition coil on the market Forever eliminating the need for ignition wires the patent pending design mounts the coil directly to the spark plug providing a custom, clean wireless appearance Provides proven automotive technology for your air-cooled Twin Cam Provides maximum spark energy to the plugs A beautiful cast aluminum cover holds the coil in place and acts as a functional heat sink to pull the heat away from the cylinder head All wiring is hidden in the fins of the head for a clean and custom look Measures 3-1/4" H x 4-1/2" W x 2-1/2" D Covered by ACCEL's limited lifetime warranty