Exhaust brakes also save wear and tear on the wheel brakes. Finally, and most importantly, safety is increased and the butterflies in the driver's stomach go back to sleep and the driver is truly in control of his rig. U.S. Gear offers exhaust brake alternatives Cutting off air to a gasoline engine is not a problem. They are designed to operate with a throttle body. Like human beings, though, if diesels don't get air, they die.
Butterfly valves, however, are the most effective way of blocking flow in the vehicle's systems.
The orifice is sized at the factory to keep your engine from over-pressuring at extreme RPMs. Remember, the only reason for the orifices in other exhaust brakes is to keep you from destroying your engine by creating excess pressure at higher RPMs. Referring to the chart, notice that because of the waste-gate you can receive the benefit of maximum back pressure almost all the time without excess pressure. U.S. Gear is proud to be the only manufacturer to offer two models of exhaust brakes. The cycle feature eliminates a problem common to the exhaust brake industry.