My 12 ram is deleted because I got tired of going to the shop every 2 months to get the egr cleaned. It’s chipped just enough to keep the computer from throwing a code. I’ve never seen black smoke from my tailpipe. I know some gets out but I’m sure it’s nominal. For those proclaiming my vehicle should be stolen by the government and I should also fined, I think you should do your part and quit towing trailers or using truck campers or driving motor homes because even you are contributing to the very thing you’re complaining about.