Question: is the 12 valve cummins?
Answer: The 5,883 cc (5.9 L; 359.0 cu in) 6BT, also known as the Cummins "12-valve" (since it has 2 valves per cylinder) was the first member of the "B" engine family to be used in a light truck vehicle. ... After 1989, the 6BT engine was used in light duty, medium duty and select heavy duty trucks and buses.