Question for you H. O. guys who tow, I have a friend who tows a large horse trailer all over the country and wants to chip his truck for a little more power. Truck history is as follows< daughter installed power puck, exuast, k&n and larger injectors, while on trip 15,000 miles later melted something in #6 Cylinder and turbo. He rebuilt #6 and took out injectors and puck and finally installed pyrometer. Truck obviously feel slow compared to before and he wants some power back. Thanks.