I've got a Performance with the little factory wing. If I want the cooler looking Nismo wing, will the holes from the factory wing show or will the Nismo wing cover them up?

 

I think you use the same holes plus additional holes if you get the nismo wing with the base on it.

 

The stock spoiler has four holes, 2 for bolts and 2 for guide pins.

With the Nismo wing you use the 2 bolts holes plus drill 2 more, the other 2 holes are just barely covered by the Nismo wing but they are covered.

 

Just make sure you silicone and tape the old holes left by your stock spoiler so water doesn't get into your car.

 

Thanks for the replies! It looks like I may be considering the Nismo wing after all :-)