They are "The Best", I had three so called shops and one dealership look into my 1999 Dodge Dually Cummins to try and find why I was having a lack of power and suddenly worse mileage with no luck. I went to Diesel Pickup Specialist and in two days had more power than ever with better mileage. I won't let anyone other than them touch my truck ever since. These guys are great and make you feel like family. Hard to find anyone this honest at a fair price. I highly recommend you give them a try. - Larry B. (5 star review on Google)