DO NOT BUY THIS WITHOUT AF2 or AF1unless you know what your doing with all the tuning if your not sure on how to tune BUY THE AF2 wideband sensor so you can auto tune it if you dont know how to tune or don’t have someone to dyno or tune it get the af2 complete plug and play super simple also buy the app that cost money the free one is bad. this ecu with the wideband is awesome so cool to mess with the features and definitely unlocked power that the stock ecu wasn’t giving me 100% will put on all my bikes!