My buddy just bought a 2002 cummins with a six-speed. It came with a power puck but he is takin it off. It also has a 4" exhaust and he is going to at a cold air and gauges. He wants a chip that will produce alot of horsepower but not tear anything up. I suggested the edge comp and the smarty jr., but i didnt know if there were anyothers he might want to consider?