That was done back in 2013, when Peterbilt introduced the 567. Its principal improvement was the 2.1-meter-wide cab, which is about 8 inches wider than the ages-old but highly regarded narrow cab on ...

Moving up in the PACCAR line takes us to the MX-11, which is used in Peterbilt model 567 and 579 trucks. This 10.8-liter ...