 That's because they had to abide by so many standards, and manufacturers today have to choke down their diesel engines just to pass these tests. But instead of the 6.0 and the 6.4 Powerstroke, you know what they received down in South America and other countries? What? They received their super duty came with the option of a straight six Cummins or the four-cylinder Ford. Interesting. Way, way, way, way less garbage on it. Efficient. Powerful.