I have a RWD rear sway bar to put on my X sedan. What do I need to make it compatible with my car, if anything? Brackets?

 

Your brackets may fit. can't say for sure since mine came with brackets. It's only 4-6 bolts; can find out in about 15 minutes.

 

Play it safe and replace the brackets. The AWD bar is 16mm and the RWD one is 24mm. It's safe to assume that the bushings can't fit a bigger than original size and it's best to use the sway bar as designed.

 

did you end up swapping out the brackets as well? looking to replace my sway bar next month and trying to get all pieces together. My sway bar didn't come with bushings, bolts, nuts, or brackets. do you have part #s for what you used and did you swap out end links as well?

 

I just checked and the rear sway bar brakets (54614-EG000) are all the same for all models of the G35/G37/Q50/Q70 and a few others.

The sway bar bushing will have a different sized ID, depending on the size of the bar.