Has anyone removed the square chrome exhaust off their Silverado? I would like to replace with dual chrome round tips ... I measured the OD of the tailpipe and I got 2.75". So my entirely ridiculous question is, what the heck size tip diameter do I use? There are a TON of 2.5" inlet, I am assuming that is way too small. There are some 2.75" tips and some 3.00" inlet size, so what do I choose? Has anyone else replaced the squares with rounds? Don't flame me, I did a search and came up with nadda. Thanks guys ...