assurance tested, more responsive, less expensive, easier to install. Single fire coil that puts out over 30,000 volts with fast rise times and high energy. Intelligent over-voltage protection; Adjustable retard timing; Short circuit protection. Programmable electronic ignition kit, with the rotor, single fire coil, control module and plug wires. Programmable Features (PC): 8 Point fully definable wide open throttle curve; 8 Point fully definable part throttle curve; Rev limit programmable in 50 rpm steps; Programmable dead cranking revs 0-10; Programmable rear cylinder offset, total of +/- 10 degrees; Programmable rev limiter; Separate programmable break-in rev limiter. Data Recording Features: Total engine hours; Time at wide open throttle; Number of engine starts (2 minutes running time counts as one start); time operating at wide open throttle; Maximum rpm; Seconds near rev limit; Statistical analysis of time at rpm. NOTE: Programmable features and data recovery features require programming software kit or go to local programming. part number: 53-660, 60-53-660-06. 53-644, 53-646, 53-642, 53-662. Fitment: For 70-99 - Big Twin (Except Twin Cam Models). For 71-03 - (Except "S" Models). For 140 C.I. Competition Series Engines. For Most Aftermarket Evolution / Shovelhead Style Engines (Like , S & S, Revtech, etc). Does NOT Fit Fuel Injected (F/I) Models. Vehicle compatibility charts are for REFERENCE ONLY. Check your vehicle with Part Number below to match your needs. Colour:As Shown Material:ABS+Metal Package Contents: 1 x Single Fire Ignition Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.