Now I have a base model G37X sedan and currently have on stock rims and tires 17".

My friend wants to sell me off his Z a set of rims and tires for racing.

the tires are pretty much slicks or close to it.

wheels are less offset, 30-35mm and I my friend says they are commonly used on our cars.
The sizes are 18x8 +35 and 18x8.5 + 30

The bolt pattern is slightly off our 43mm at 35mm. is this a problem?

also will this kind of set up cause rubbing? or damage to differential / rear?

let me know if this is a good idea or if its dumb.

I am contemplating it. never really been into racing the car.

thank you and don't be shy. If this is a stupid idea let me know.