I removed my mufflers to put in the rear diff and upon re-installation the exhaust flanges are warped where they connect to the muffler. Both sides exactly the same. Where the bolts go it's fine, it's in the middle where it's going to leak. Bought new gaskets too. Anybody else seen this? I guess I just have to use a die grinder to try and make it flat again. Just weird both sides are like that.