- Is the A pillar on a '04 g35 coupe interchangeable with the A pillar of a 350z?

 

I doubt it. The 350z has more of a curve to it.

 

If you have a connection at the parts department of an Infiniti dealer, get them to look up the part # of the a-post outer skin and the inner structure. Then call a Nissan dealer and do the same. Dependent on your need for the part it's possible the actual pillar is the same there's just a difference where the roof "rolls" over. There's always a short section that's part of the roof.