Cut downhill speed up to 49% without using wheel brakes! Saves brake wear-and-tear. Computerized brake controller, safe, reliable operation. No maintenance.Banks’ revolutionary design produces stronger braking power than other exhaust brakes. The large-bore housing, streamlined to increase airflow and diffuse exhaust, adds to engine power when Banks Brake is inactive. Banks engineered in a timed valve closure rate to prevent backpressure spikes common to other exhaust brakes and provide smooth operation. Every unit is factory tested and never requires calibration.Note: SmartLock required on automatic transmissions. US Patent #6,152,853 A

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