Has anyone done a green ecodiesel hot program on there 2020 ecodiesel and is it worth it also anyone add a k&n cold intake system and if so what is the model
You are wasting your money to add a k&N cold intake or any other system. The stock air intake will provide more air than the small Ecodiesel turbo can handle. Early on GDE proved this and later others have as well.
Most people appear to be very satisfied with the GDE tune. I am not sure I have heard any one say "I am sorry I bought the GDE EPA compliant engine and trans tune.