4" Aluminized Downpipe that fits the 2008-2009 Ford 6.4L Powerstroke. This pipe is designed to bolt in as a replacement for the stock downpipe. It will allow the CAT/DPF to bolt up to it, which should be a great help if you need to put them back on. It also allows ANY downpipe back exhaust to fit without cutting. Install time is about 1 hour. Ceramic coating can be added for $50. - MADE BY POWERSTROKER67