(USED) 2011 FREIGHTLINER CASCADIA 125-AIR CLEANER FOR DETROIT DD15. P/N 03-33648-001 MODEL: RECTANGLAR SHAPE, TOP ENG MOUNTED. To find out more about this part, give us a call. We ship worldwide! Complete Recycling Group (CRG) 929 W PULASKI HWY ELKTON, MD 21921