Mustang Dynamometers are unique. All Mustang Dynamometers are loading dynamometers designed to duplicate real world operating conditions. Our patented control system uses eddy current power absorbers to load a vehicle exactly the way it would be loaded on the street -- including wind resistance, which is a significant factor in high-speed testing. Mustang dynos also feature a load cell to measure the power being applied to the rolls. A Mustang dyno gives you a real world tune, every time.