desertryder,
We have a special performance muffler that is desgined specifically for the 2004. 5 and newer Dodges. It uses our standard performance muffler like we use in all of our systems, except it's a little shorter as we also provide you an "S" shaped 4 inch mandrel bent tube to align the 4 inch stock exhaust tubing with our muffler system. The stock muffler is a low in - high out design, so to use a straight thru high flow muffler you need to have the "S" pipe to line eveyrthing up correctly. The muffler and pipe have all the hangers welded to them to reuse the factory hangers, this makes installation a snap and as easy as possible. The performance muffler assembly is buitl from T-409 stainless steel just like the stock system is built from, it eliminates a lot of electrolysis this way as compared to using aluminized etc. We also have a cat test pipe for offroad use in 409 stainless for those that like it louder than a stock system etc.
Mark @ DPPI