Not like any other self-tuning controller, Revolution Performances Precision EMS is a true self-optimizing system; adjusts almost instantly with little additional adjustment. Simply set it up and ride; no laptop, no dyno and no downloads. Delivers instant results instead a little better with each ride; while most systems require the system to learn more than two thousand fuel cells over a tremendous number of rides, the Precision EMS factors in air/fuel ratio, timing parameters, load and temperature ranges then adjusts to them instantly. Will benefit everyone; from the owner of a stock bike to a full-blown 135" Takes full advantage of, and retains, the stock Delphi ECU. Maintains OEM safeguards and features, like ion-sensing knock protection. Only system with engine-load-based timing control. Utilizes wide band O2 sensors to constantly monitor and adjust. Includes Precision EMS controller, two wide-band O2 sensors, ECU shipment box and customer information sheet. Made in the USA. ECU will be calibrated by Revolution Performance. Pre-paid, next-day-air package included. Not legal for operation on public highways in the state of CaliforniaThis item fits the following models: 2007-2010 Harley Davidson FLSTC Heritage Softail Classic2007-2010 Harley Davidson FLSTF Fat Boy2010 Harley Davidson FLSTFB Fat Boy Lo2007-2010 Harley Davidson FLSTN Softail Deluxe2008-2010 Harley Davidson FLSTSB Cross Bones2007 Harley Davidson FXST Softail Standard2007-2009 Harley Davidson FXSTB Night Train2007-2010 Harley Davidson FXSTC Softail Custom2007 Harley Davidson FXSTD Softail Deuce
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