My exhaust is finally getting to the point where I'm going to have to replace it. It currently has 3 inch true duals with stock cats with 2 aftermarket mufflers (can't remember what brand, they are stainless though). What's the consensus on exhaust now that the 5.3 has been around for a while? is single with a good muffler the way to go or is 2.5 inch dual? I know 3 inch is definitely too big for a stock 5.3