This new model from MSD has a lower profile for a sleek look. The wiring is all routed out one end of the unit through a sealed and locking connector. This eases installation and keeps your wiring looking neat and clean. The rev limiter is positioned on top of the housing for easy access to the two rotary dials to set the limit in 100 rpm increments. Inside the Digital 6A you’ll find a microprocessor that monitors and controls every firing and rev limit. The circuits are updated with efficient components that help the ignition produce more power while drawing less current! In fact, the new Digital 6AL deliver over 530 volts to the coil with up to 135mJ of spark energy – for every firing! Increased output combined with MSD’s proven multiple spark series is a win-win situation! The new Digital 6AL is supplied with the wiring harness and the components you’ll need for installation. The ignitions are compatible on 4, 6 or 8-cylinder engines with 12-volt, negative ground electrical systems. They’ll accept trigger inputs from breaker points, amplifiers and magnetic pickups.