Bully Dog Triple Dog GT Gas Tuner and Gauge 50 State Legal (bd40417 is less expensive 49 State Unit)The Triple Dog Gauge Tuner or GT is four products in one; a vehicle engine tuner, monitor, gauge and diagnostic device all in a single unit. The GT dramatically improves the utility of your vehicle by increasing horsepower, improving fuel economy and providing a comprehensive set of monitoring features and diagnostic functions. This product is incomparable to other tuning products because it has the largest feature set and the widest range of vehicle