Cobra Fi2000 PowrPro Tuner Digital Fuel Processor for 2012 Harley Davidson V-Ro New patented technology unlike any other auto tune system on the market Tunes to exactly what air-fuel mixture creates the maximum power 80 times per second (does not tune to some arbitrary AFR someone has picked). Creates that adjustment to maximum power on every squirt of the injector. It is like having the best custom map writing, dyno operator tuning your fuel every time you crank the throttle Tunes every gear, every roll on, every enviromental change, every engine mod, lugging the engine, winding it out to redline: it reacts, verifies and adjusts