Sterling Truck AT9513 1999-2001 Inlet 2-1/2 in.; Outlet 2-1/2 in. Ford AT9513 1996-1998 Inlet 2-1/2 in.; Outlet 2-1/2 in. Freightliner FLD112 2003-2005 Inlet 2-1/2 in.; Outlet 2-1/2 in. Freightliner Classic XL 2003-2007 Inlet 2-1/2 in.; Outlet 2-1/2 in.