In a joint engineering effort between BD Diesel Performance and BorgWarner Turbo Systems’ AirWerks, turbo systems for the 5.9L Cummins engine were developed. For a performance “single” replacement, we wanted a turbo that had an air flow range that meets the air demand for stock engines and engines with up to 150 hp modifications. It also had to be responsive and durable enough for street and heavy towing applications and for mild race track applications. Plus, it had to be backed by a one year factory warranty! With these criteria, the BD Super B Turbo series was created.