Currently have an EC v2.1 with the retrofit kit on my '18 500C. I went to return it back to stock and the little bracket off the EVAP sensor that screws it to the stock airbox fell behind the engine and I couldn't see it or find it under the car. Tried looking on moparonlineparts and ebay for it but it looks like they just sell the sensor. Or if anyone has a 15+ airbox for sale that has it, let me know.
sensor.jpg
sensor.jpg