Vance & Hines FuelPak LCD Harley Davidson Softail 2012-2013 - 61017 Available in original version which is not legal for sale in ca or new california a.r.b. approved version with all the same features as the original, note: not legal for sale or use on pollution controlled vehicles (original fuelpak). Throttle position sensor-based system simplifies the process of fuel-injection tuning, enables you to fine-tune the fuel mixture throughout the entire rpm range with the touch of a button Increases power and improves throttle response, very user friendly; plugs into the existing harness on the bike No computer or software is required, simply punch in the values supplied with the fuelpak, values supplied are for use with vance & hines exhaust systems Fuelpak will also work with other exhaust systems (contact v&h tech support for tuning information) includes all necessary mounting hardware