Features: Plug and Play upgrade to current installations with a 6201, MSD 6A; New processor and board design provide a highly efficient ignition, minimal heat and max spark energy with less current draw; 60% smaller and 50% lighter than the MSD Digital 6A (688 grams vs 344 grams); High rpm operation and maximum output using the Blaster HVC, PN 8252 or HVC II, PN 8253; Powerful capacitive discharge of multiple sparks improves performance, and ensure complete combustion; Consistently high spark energy of 135mJ to 150mJ for every firing, from idle to redline rpm; Easily installs on 4, 6, 8-cylinder engines with distributors; Operates on most 7 to 28-volt electrical systems; Connects to points and magnetic pickups; Fully protected against an open coil, shorted coil & open load; Compact design - full MSD power; Quickens throttle response & improves starting; Tach Output to drive an external Tachometer;