Granatelli 987517-MM - Granatelli Diesel Mileage Miser

Do you want horsepower and torque gains while decreasing fuel consumption? Granatelli's Mileage Miser is the product for you. Every Mileage Miser is guaranteed to give you an additional 50-HP and 150-ft./lbs. of torque while increasing 3-MPG! This plug-in-play device alters the factory tune to provide more performance and efficiency.