I don't know who DPP is, but B & G Chysler is who tunes Modern Horsepower's TCM's. I have a B & G tuned TCM from when I bought my Suncoast mega 3 rebuild kit. It worked great. That transmission shot craps. I bought the ATS co-pilot and evidently it did not play nice with the B & G tuning(which ATS was aware I had). So the suncoast rebuild fried. I never brought this up because I was driving very hard when it let go. So I order the top of the line ATS transmission and it lasted one month. It blew the over drive clutches(no hard driving what so ever) so as of yesterday it will be one month that my truck has been down. ATS sent a new brand new transmission in a timely fashion, it has yet to shift gears, even with the co-pilot unplugged. Sorry for the rant. In short the Modern horsepower tuning I liked. You might also check on tuning from H & S.