Would These Fit A S5?!?!?!
 

18 x 8 +35 offset front and 18x9 +35 offset rear 5 x 114.3 bolt pattern.

or would i need TONS of power to drift with the wheels since im still stock NA with only exhaust....

thanks.

please reply as quickly as possible... thanks

You should look in "The Official FC Wheel Fitment Thread". Those will fit, but it's a bad idea. I'd not go with anything more than a 17" wheel on an FC, it just looks wrong if it's any bigger. I'd also not stagger an NA FC, because they understeer with equal tire sizes, so it'll just get worse if the rears are any wider. Also, larger diameter and wider wheels are heavier, and they've got lots of mass far away from the hub, which means they take more energy to spin, meaning you'll accelerate slower and it'll be much harder to get oversteer. Also, the tires in the narrower sizes and for the smaller diameter wheels are cheaper, which is a good thing.

I've got 17x8 30mm offset wheels with 225/45/17's all around and it fits nicely and retains the stock balance without slowing the car down too terribly much.