Designed for the race enthusiast to give you the deep powerful race truck rumble with impressive acceleration and increased horsepower gains. Designed for hassle free, bolt-on installation. Typical dyno tested horsepower gains average are 10-15 and 15-20lb-ft of increased torque. Fuel economy may improve as your engine becomes more fuel efficient. Not recommended for heavy duty towing. Noise level may exceed 95-decibel standard.