[Chipper Chapman]

I just bought an ‘03 Chevy C class with an 8.1L. I was underneath checking it out and noticed one of gms greater ideas, the factory 2-3/4” dual exhaust runs to just ahead of the middle then into a factory collector that necks it down to 2-1-2” single with single in/outlet muffler. I plan to put a tune into it for a little better mileage but knowing how restricted gm’s mufflers are I want to put something better on that’s not very loud. I’m thinking single muffler with dual inlet/outlet. What is a decent muffler that isn’t going to make me hate driving my new motorhome?