I'm glad someone at the EPA is listening but I'm afraid it's too late for most of the current model motor home owners with issues. By 2027 most of the current models will be out of warranty. I doubt Cummins will spend the time and money to retro fit older motor homes (and trucks) once they are out of warranty.
Unfortunately, the only way to get action quicker is for someone to file suit based on safety issues of being de-rated to 5mph on a freeway.
97 Monaco Windsor- Sold
07 Monaco Executive McKinley- Sold
04 Monaco Signature Chateau IV