Im new to this forum and Ive been looking around for a newer truck and have found some pretty good deals on some 08 powerstroke, they were government vehicles and have all records on them. It has 110,000 miles. I would be wanting to add some mods to help with power and fuel. I know deleting the dpf would help. But would just a dpf delete pipe be good enough? What programmer should I go with. Also does it need an aftermarket air box or is stock good enough.