A staple in the drag race community, features a built-in 2 step rev control and its famous high output spark energy. Now in Black!. You'll recognize the 7AL-2 Plus Ignition Control now in Black! As its predecessor is the most popular ignition control used in drag racing. The "Plus" model updates the original 7AL-2 with improved internal components plus our engineers added a 2-Step Rev Control and a useful diagnostic LED. Racers will be happy to see that the updated components up the voltage output and spark energy! Over 40% more spark energy in fact! Visually, you'll notice the two terminal strips that allow for easier wiring in your race car.