I am putting some '06 nissan OEM rims on my '04 and am assuming theres no difference in the lugs, right?

 

I think so.

 

Yea I think only the track models have different lugs

 

lugs are the same across the board for the Z. no different sizes for the thread, but different brand of lugs have different outer size for the tool you use to take them off. common sense would dictate that Nissan would not make different thread size lugs for their wheels the lug size is 12mm x 1.25

 

Yep, they're the same. In fact, I think they're even the same on the Z32, if I'm not mistaken. Anyone care to correct me?