Has anyone on the forum, either 2011, well actually 2009 through 2011, done their exhaust by simply taking out the factory muffler and just welding in straight pipe after that? I was just wondering. I did this on my 05 avalanche, and my 06 silverado. Of course on both of those i then ran duals out the back. However since i have a 2011 QC Sport with the "factory duals" i was thinking about just removing the muffler and welding in the stainless steel pipe and leaving it like that with no muffler. Just wondering.