The medium-duty PX-7 has a displacement of 6.7 liters ... pound-feet of torque and is found in 567, 579, and 589 Peterbilt ...

The Extended Day Cab is available on Peterbilt’s entire medium duty product line, which spans Class 5 through Class 7 and includes the Models 348, 337, 330 and 325.

Peterbilt is now offering LED headlights as an option on its medium-duty line. They offer greater light output ... (Photo: Peterbilt) The new LED lights can be spec’d on the Models 548, 537, 536 and ...