pipe

Hello All, I bought an axle back exhaust system and when I went under to remove the old noticed a dent in the exhaust pipe up further than I was going to replace. Is this enough to affect performance and I need to get a cat-back system? 07' Wrangler JK 2DR.

So I got a new muffler put on at the local discount Mexicano auto shop (learned my lesson) and they rearranged my exhaust so the pipe forward of the muffler sits about 1/2 inch above the transmission support member and now rattles like a mother. Instead of getting the exhaust redone I'm...