Fubar, thanks for the heads-up and the photo. My Borla recently started making an annoying resonance at about 1500rpm after warm up. After reading your post I checked my welds. I have the same crack in the same spot. Having the muffler repaired locally will be cheaper than returning it to Borla even if you did have a receipt (I don't either). By the way, Jay Reinhardt is no longer working at Borla.
Howard
Howard