Hi all, came across the site looking for a muffler for my 04 ram.(mine rusted out). I noticed most of the aftermarket mufflers were either 4" or 5" inlets and outlets. My stock system is 3", this got me to consider going with a whole new system. I'm more than happy with the way the truck performed stock, but there is always room for improvement. I just would like to hear other input from those that have changed their exhaust systems,ease of install is huge since it will be done in the drive. The truck is totally stock, any input would be great.