I know I got this answer from Matt but I deleted the msg, but I'll ask here for quick question. I found a set of flowmasters 70 big block 2.1/2 in and out. Will these fit for a 2007 ss? I'm gonna be in the sure need of mufflers soon to quiet down things around my new neighborhood lol

 

The only way to know for sure is to compare the dimensions of the Flowmaster to the OE muffler. If it is the same or slightly smaller it will fit. You may need to extend the tailpipes if it's shorter. One thing you'll need to do is weld hangers on them.