Dynojet AT-121B - PV AutoTune Kit (with Bungs) for Harley-Davidson MT22 ECU ServiceNumber_4C3A_12A650_AXC Part number: 8U7A-12A650-HJA

Part number: 8U7A-12A650-HJA

Part number: GM5A-12A650-ZA

Part number: BC3A-12A650-EMA

Part number: 5R79-14C204-EC

Part number: BC2A-12A650-AXC

Dynojet AT-121B - PV AutoTune Kit (with Bungs) for Harley-Davidson MT22 ECU ServiceNumber_4C3A_12A650_AXC Part number: 8U7A-12A650-HJAThe Dynojet PV AutoTune Kit (with Bungs) for Harley Davidson MT22 ECU is built for tuning setups where wideband feedback is part of the plan. It gives the calibration process better data to work from instead of relying only on a base map and guesswork. Why It Matters Adds wideband feedback support for compatible Dynojet tuning systems Helps refine fueling when the vehicle setup changes A strong add on for builds where accurate air fuel data matters