(2012 G37 Sedan RWD) So yes this fits the sedans Bolted right on no issues so far got it up to 100 to see if any vibration or any added noises nothing really but I did swap out my Diff bushings and trans Mount so might have some sounds but I don’t notice drives smooth and definitely more responsive and feels a lil quicker too

After installation I felt a little better acceleration... But driving on the highway at 65+ mph I noticed some vibration. I put a dial indicator on the back end of the shaft near the yoke where I saw the surface was machined round. I measured a .008" total runout. At highway speeds this is about a 35lb imbalance. Inland told me that was normal runout. Also, I don't think they put the foam inside as it rings like Christmas when I tap it.... this is why the lower rating. Otherwise nice quality...