Description
Enhance your vehicle’s performance with the Bully Dog 40420 GT Diesel Tuner & Monitor. Unlock more horsepower and torque for better fuel efficiency.
The following vehicles require the 42215 bypass cable to properly tune with the GT diesel tuner. The 40420 comes with a mount. Cable sold separately.
2018 RAM 2500-5500 6.7L Cummins
2019 RAM 2500-5500 6.7L Cummins
2020 RAM 2500-5500 6.7L Cummins
2021 RAM 2500-5500 6.7L Cummins
Bully Dog tuning devices will not modify or delete vehicle emissions. Bully Dog products 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 environment overall. Custom tuners are required to follow the guidelines of the Clean Air Act as they develop their own tunes for our devices.
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