I have been looking at having my exhaust done on my Sierra Denali. I don't want anything too loud so I think I'm going to go with the Magnaflow 3 1/2" inlet Dual 3" Outlet b/c the truck has 3 1/2 exhaust from the factory. I'm also going to use the Magnaflow 3"inlet/3.5"outlet tips. Here's some pics of the tips. Anyone have an opinion on this stuff?