Incorporating BD's exclusive Variable Orifice Technology, the
BD brake provides up to 150 retarding horsepower throughout the engine's RPM
range - not just at high RPM like other brands. The rugged, cast-iron housing
incorporates BD's exclusive alumibronze bushing and piston ring-sealed, stainless
steel butterfly shaft that has proven to stand up under the harsh, high-heat
conditions of the exhaust environment. The BD exhaust brake is the most widely
recognized exhaust brake in the industry for one simple reason: It's the best!