This fuel injection module works in conjunction with the stock ECU unit. No need for permanent changes. It will makethe fuel system and the ignition fully programmable. During cold start-up the Power Commander can read the exact engine temperature through the bike''s own ECU;which allows the tuner to choose how much fuel to add for a given engine temperature. Big Inch modified bikes should be easier to start than ever.With a universal on/on toggle switch; or the Dynojet PCV MAP switch; it is now possible to switch between two fuel/timing maps; like for economical touring and racingor high octane and low octane fuel. The Gear/Speed input allows maps adjustments based on gear. The Analog input allows the tuner to install any 0-5 volt sensor andbuild an adjustment table based on its input such as boost or temperature. The Power Commander can be tuned on a PC with an USB cable connection; no extra powersupply is required. Complete with software for tuning but ready made maps can be downloaded if preferred. Dimensions: 3-1/4"/83mm wide x 2-1/4"/57mm high. FEATURES - Compact design for discrete placement & easy uninstallation to revert to stock settings. - Vast library of tunes for any combination of aftermarket parts. - Easily change & upgrade tunes as you upgrade parts. - Comes with Power Core software that connects dyno runs with our EFI Tuning Devices to unlock your ride's potential. - Upgradeable with additional features such as auto-tune and launch control (included MCS vehicle fitment: Indian: Chief 2018. Chief Classic 2014; 2015; 2016; 2017; 2018. Chief Dark Horse 2016; 2017; 2018; 2019; 2020. Chief Vintage 2014; 2015; 2016; 2017; 2018; 2019; 2020. Chieftain 2014; 2015; 2016; 2017; 2018; 2019; 2020; 2021. Chieftain Classic 2018; 2019; 2020. Chieftain Dark Horse 2017; 2018; 2019; 2020; 2021. Chieftain Elite 2017; 2018; 2020; 2021. Chieftain Limited 2017; 2018; 2019; 2020; 2021. Roadmaster 2015; 2016; 2017; 2018; 2019; 2020; 2021. Roadmaster Classic 2017; 2018. Roadmaster Elite 2018; 2019; 2020; 2021. Springfield 2016; 2017; 2018; 2019; 2020; 2021. Springfield Dark Horse 2018; 2019; 2020; 2021. Roadmaster Dark Horse 2020; 2021. Roadmaster Limited 2021. Vintage 2021. Vintage Dark Horse 2021.