I was up under my car the other day trying to straighten out my ugly ass exhuast tips, and I noticed a little arrow on my muffler, it said "flow ---->" but guess what....it was facing the wrong way (thats why I don't let anyone work on my car but me!)

does that really make a difference? Would it affect the flow in my exhuast. I would have flipped it around right then, but the clamps that hold the pipes on had crimped them a little, and I'm scared if I take the pipes out of the muffler I won't be able to get them back on. If there is a big difference I'll probably swap it around, but is it worth it?