Here is my review of the Mufflex DOD24M kit for the 4th gen trucks:
- Installation is very easy. It took 90 minutes from start to finish, including pulling out and cleaning up tools. The most difficult part is removing the tailpipes which WD-40 helps with. My tips were perfectly aligned after reinstallation.
- The system sounds great on start up but similar to stock at idle. It's much louder on acceleration in the cab, but whisper quiet while cruising.
- This system has a drone at 70 mph with or without MDS. It's not like a modular Ford with an x-pipe "my head is going to explode", but it is certainly there. It can be overcome easily by the radio at a normal listening volume. I would imagine full catbacks tune this out.
- There is no noticable difference in the MDS sound with this muffler versus stock. Still sounds kind of weird...
There are not many videos of this system around, so I created the following:
I have an exhaust of my car that is borderline obnoxious, so I was looking for an exhaust that was a little louder than stock but maintained the quiet ride (my truck is my DD). I think this system does just that. I won't annoy the neighbors, but will still turn heads.