Makes it possible to adjust cruise for best fuel economy as well as larger throttle openings for peak power User can specify what air/fuel ratio to make each rpm and throttle position percentage combination Includes 18mm O? sensors and power connector that plugs into the bike's harness Base settings included for air/fuel ratios, but are fully adjustable if need be Plugs directly into the Power Commander V with a single cable Makes automatic fuel adjustments Made in the USA. AUTOTUNE PCV 12-15 ST/DYN