I have been watching Craigslist and 2 tuners have showed up one is a x3 that has 3 custom tunes and is not the same strategy as my truck so I would have to get tunes written. It is 250. The other is the sf3 and has the stock canned tunes. It was on an 06. He stated it was not unlocked to get custom tunes. He is asking 300. My truck is basically stock with an assumed welded egr cooler. Mainly right now I would like to shut off the cel and start amounting some goody parts. I typically tow a 6x12 enclosed trailer with tools throughout the week and normally drive 50-100 miles a day. I want better performance and mileage (if those 2 can be said in same sentence) I had truck at dealer recently and they reflashed the truck and I swear I lost power. Thanks for advice.