MSD 6AL-2 DIGITAL PROGRAMMABLE IGNITION CONTROL -- 135 mJ per spark, 535 V primary voltage, 45,000 V secondary voltage, 20 degree crankshaft rotation spark series duration, 12,500 rpm with 14.4 V rpm range, 12-18 V negative ground voltage required, 0.7 amp per 1,000 rpm current draw, 3lbs. W, 7 x 4 x 2 in.; Features advanced PC programming for use on street/strip and track cars; PC programmable with easy-to-use Windows based Pro-Data+Software; Plot a timing curved based on boost pressure down to a 0.1 degree every 100 rpm; Program three rev limits in 100 rpm increments; Step/retard for nitrous applications plus a boost timing cap; Capacitive discharge technology for high capacitive and spark energy.