The passenger side pipe from the collector to the h-pipe lines up fine, but the driver side pipe won't line up w/the h-pipe properly nor will any placement of that would remotely allow it to mate w/the h-pipe allow me to be able to get the o2 sensor in there! Are the driver & passenger pipes supposed to be different angles/lengths? I'm hoping they just included the wrong pipe. If that is not the case then this is a terrible piece and BBK should be kicked in the face for this. If it's not a wrong pipe sent issue, what H-pipe should I get to match up w/my MAC shotry headers & MAC cat-back? This is a catted h-pipe & I need another catted pipe. I took an offroad MAC h-pipe for this BBK piece and the MAC piece was perfect. Unfortunately, MAc no longer makes catted h-pipes.