Dis Direct System Control Box Gm/Ford/Dodge V8 Using Dual Sync Distributor MSD IgnitionTiming is digitally controlled ensuring precision accuracy at all RPM's and every firing. The DIS has advanced timing and rev limiter functions for racers such as individual cylinder timing timing retards for boosted and nitrous applications, a two step rev limiter, and launch control to get your car out of the hole and even data acquisition to keep everything in check. Modern Firepower for your classic the MSD Direct Ignition System, or DIS, converts