Dear sir or madam; Prior to ordering your product, the AquaTunePlus, I asked you if this system would increase my fuel economy because I was already getting pretty decent mileage at the time. Not only did I prove that it would, my mileage increased by 40% consistently. Your system is absolutely incredible! The horsepower is just as impressive. Also, my transmission doesn't downshift anymore when I go up steep grades. I will be telling everyone I know about this product because I definitely got my moneys worth. Please tell your sales staff thank you for the excellent job.