Help please, I just receive exhaust system from Rockauto for my 93 YJ. #17309 Walker. No packing slip so not sure what they sent. Received a DynoMax Tubo muffler but not the same as my old one. My inlet and outlet are centered on muffler, the new one has one center and one offset. Don't know which in inlet side and even if this is correct for my jeep. Maybe mine was changed and what i have is incorrect and the new is correct???? Don't like that you cannot talk to Rockauto.