I have a 2008 infiniti g35x non sport. Will 18" wheels from a 2011 infiniti m56 fit?

 

As long as they are not staggered you should be fine. Having a staggered set up can mess with the awd system giving you premature problems. You need to remember to keep the overall rolling diameter the same on all four wheels. Hope this helps.

 

It does, thank you!