2002 - 2007 have NO 02 bungs from the factory...The 08's have bungs front and rear and are not welded to the 3rd volume. The 07 and earlier only have one 02 sensor in them....
My bad I thought the 02 to 07's had a single O2 sensor... ignore the man mumbling in the corner......2002 - 2007 have NO 02 bungs from the factory...