It has the Cat 3126. This Rv pulls like a dream and runs great! Allison MH-3000 6 speed Built on a freight-liner chassis 38ft 2 Ac units 1 slide out Tires are in great condition Owen 6300 propane generator Zero water leaks and the roof is in good condition. The paint on the driver is pretty flaky but looks great for the year! This has been a wonderful rig for us! just went a different direction with my racing and now sleep in the trailer. $18,700 OBO. Come check it out and make me an offer Diesel pusher