So far so good!! My check engine light was coming on after installing aftermarket parts and was getting a code for cat efficiency and this seems to of worked! Also on my 2012 g37s sedan I installed megan headers, test pipes and the y pipe and I had pretty much ZERO clearance between the top of my O2 sensors and trans pan, so with this part I killed 2 birds with one stone!!! Thanks CZP!!!

Does not fit Berk Resonated Test Pipes on the G37X. Even one spacer is too large because they already come with a spacer welded too them (still throws a CEL), so the transmission pan on the AWD model will be in the way. Even using just the one 90° angle will fit, but threads on and faces the wrong way, so you’d have to install before putting the pipes on with one spacer and the 90°, or leave it dangling/extremely loose facing the correct direction which I’m not going to do.