Hey all! My brother just purchased a 2006 f350 6.0 auto truck and we are wondering: if you put on an egr delete tune do you need to remove the valve and cooler? It has a coolant filter from sinister diesel and the previous owner had the whole egr system replaced but with the stock parts. Also who is a good tuning company to go with? I have heard good things about bully dog and sct but I am just wondering what you guys suggest.