MSD’s 6A ignition box has been a go-to item for decades, but with the new Ultra 6A, we’ve managed to not only make the box smaller and lighter, but we’ve also made it better, too! The Ultra 6A uses the same connector as the 6A box and works on any distributor-equipped engine, and provides an improved spark output (130-150 mJ of spark energy for every firing, from idle to redline). If you need to free up some room or want to upgrade your ignition system, MSD has you covered!