MBRP "Cool Duals" T-409 Stainless Steel (XP Series) Part # MB-S6110409
Came off an '04.5 4x4 Dually. It is a "Cat Back" kit that includes the MBRP Cat Delete pipe. Bolts right up to your factory down pipe. Light surface rust that can be removed with a little elbow grease. Can't be seen...