What to buy first Coilovers or wheels?

[mad-ass]

Since you said 350Z..I would say you replace some bushings and do maintenance on the car before you even think about modding it.

and if you are going to get wheels or coilovers, get both at same time, or don't put either of them on until you have both.

hell, better yet, invest in some tools while you are at it.

[CandySucker]

coilovers always

[dailyc30]

Coilovers first, that will be easier to figure out what wheel setup can be fitted.