I gave up and bought the smarty jr with the ME software to do the DPF delete. so far the mileage increase seems really good. the sound is not much different, just a little louder but nothing like my old 01. My only problem now is i always get an EGR code. I've cleared it and it comes right back. also when i first did the delete i could not figure out why my truck was smoking continuosly. I had to unhook a throttle valve under the hood then that problem went away. I don't know if there is any way to get around the engine light coming on for the EGR unless i spend about another $140 and do the EGR delete too. does anyone know a way around it?