Descending grades with trailers can be hazardous and tricky and often results in over-heated service and trailer brakes. This leads to brake fade, excessive wear, and costly unwarranted repairs. BD Diesel Exhaust Brakes is the top diesel performance industry time-proven Exhaust Brake. All BD Diesel Exhaust Brake kits come complete with the brake, air compressor (where applicable), mounting hardware, port to monitor the brake’s retarding performance, complete instructions and most models come with EGT port.