Bully Dog began in American Falls, Idaho in 1998 as an enthusiast business focused on improving diesel engine performance. Since then, the brand has come to stand for leading …

Bully Dog's BDX Performance Programmer gives you the power to tackle tough terrain, heavy payloads, and maximize fuel economy on the highway.

Explore Bully Dog's gas and diesel truck tuners and monitors for performance, efficiency, and real-time monitoring. Optimize your ride now!

Enhance your vehicle's capabilities with the 40417 Bully Dog GT Gas Tuner and Monitor, featuring preloaded tuning you can plug ‘n play. Shop now!

Bully Dog products that are purchased comply with the Clean Air Act. Tunes that are preloaded in our devices have gone through hours of testing to ensure the safety of the drivers and the …

Bully Dog tuning devices will not modify or delete vehicle emissions. Bully Dog products that are purchased comply with the Clean Air Act. Tunes that are preloaded in our devices have gone …

The Bully Dog ECM Tuner is built with simple, easy-to-use performance in mind. This powerful device comes preloaded with the same high performance, dyno-proven tunes as our gauge …

Looking for the best performance tune or chip for your Toyota Tundra, Tacoma, or 4Runner? Bully Dog BDX delivers real gains and customizable power for Toyota performance upgrades.

The Bully Dog GT Diesel tuner and diesel monitor unlocks more horsepower & torque to meet the unique demands you put on your vehicle. With preloaded tuning you can plug ‘n play. The built …

Bully Dog's BDX Performance Programmer gives you the power to tackle tough terrain, heavy payloads, and maximize fuel economy on the highway.