Carefully applying science and engineering to our line of tuning products grants you safe and consistent power delivery every time. Our experts spent hundreds of man-hours developing the unstoppable Derringer tuner to create the only tuner that utilizes your Diesel's engine control module (ECM) to make intelligent calculations. Browse Diesel Derringer Tuners, Six-Gun Diesel Tuners, EconoMind Diesel Tuners, and more. Choose your preferred power level and enjoy your ride all while controlling temperatures and keeping your transmission safe.