This is the first I've heard of your dissatisfaction. Could you please email me with your order number so we can send you a return label and get this sorted?
While I did read everything you posted, I'm having a tough time understanding how this could cause a boost leak. We have our o2 bungs set inside the pipe to allow clearance, this is the same method AR and MS use, it's not just us. It looks like the finish work around the o2 bung was overlooked on this individual pipe which is definitely not our standard of quality.
Please contact me directly so we can get this taken care of