Bully Dog is at the forefront of performance calibration technology for gas and diesel vehicles looking to add performance, tackle tough terrain, haul heavy payloads, or tow trailers over long distances. Their software adjusts to better respond to tire size, axle lockers, throttle sensitivity, and shift firmness. They also offer performance intakes, diesel particulate filters, manifolds and turbochargers to help vehicles run stronger and longer. Bully Dog began in American Falls, Idaho in 1998 as an enthusiast business focused on improving diesel engine performance. Bully Dog products are built to be flexible, allowing each user to get their own desired result, from the race track to improved fuel economy driving down the highway. Bully Dog products have you covered with increased performance, added safety, and improved economy.