Hi have a few questions I know someone on here can answer for me. I have a 2012 Ram 1500 5.7 hemi with a single exhaust out the passenger side behind the rear wheel. I'm looking to change the Muffler to a Magna flow, either an eighteen inch or 14 inch. I know Mufflex makes these but I think I can save a few $$ by just getting the Muffler. Question is Is the exhaust pipe 3 inches in and 3 inches out? Second question is the pipes going into the Muffler Center in and Offset out or Center in and Center out? It's hard to tell by the pics I've been able to find. Also hard to find good sound clips of the 14 and 18 inch I was recommended to install the 14 inch but not sure if it's going to be to loud. Thanks for the help.