Item as described. I added this to my 06 2500hd with 6.0 engine. Remember you will need to weld it in as it will not slide over standard tubing as the tubing diameter is the same. The muffler sounds good and is louder than the original without waking the dead. It hums a bit on the freeway, but mine blows out after the muffler, which probably makes it worse than coming out through the OE tailpipe.