For those of us in states with emissions, it would be super if somebody made one. There's one for the M3, one for the N54 ... but not one for us. Is there some technical limitation or a lack of interest?
Really sucks to have the DP uninstalled, reinstall the stock one, drive around for a day, then come back, get inspection, get stock dp uninstalled, and finally get the aftermarket dp reinstalled. Not to mention the labor money involved.
If you are reading, vendors, I would not like to repeat the above process next year!