MSD 6AL IGNITION CONTROL, WITH ADJUSTABLE REV LIMITER -- Fits 8 cylinder vehicles; Capacitive discharge ignition box output, analog circuitry, 460-480 volts CD voltage output to coil, 1 Amp per 1,000 rpm current draw, 115 Millijoules spark output, 10 volts minimum operating voltage, 18 volts maximum operating voltage, 8.00 in. length, 2.250 in. height, 4.00 in. width; Red ignition box; With adjustable rev limiter; The most popular ignition control in the world featuring the safety of a soft-touch rev control; Allows for additional RPM accessories like a two step rev control for setting of 2 RPM limits; adjustable in 100 rpm increments; Includes MSD's Plug-In module for 3,000, 6,000, 7,000, And 8,000 RPM, supplied with rubber shock mount; With 1-year MSD limited warranty.