I currently have the NISMO S-Tune kit on my 06Z with the stock 18'' wheels on it. To be honest, i dont really see a difference with the stock set-up and this one.. Maybe a little. I figured .8'' drop would atleast be noticeable. Anyway, i want to get some 19 's on with a low offset.... My question is will the gap get even bigger running 19's?

Wish i had some pics..................

 

What gap? The gap between the top of the tire and the edge of the fender?

 

Yup

 

No. 17 or 20-inch wheels make no difference. You still maintain the same overall tire height.

 

Nismo suspension is more like .5-.6 in. drop; not much at all. As long as you get the proper sized tires, the gap size will not increase; it may just "appear" bigger b/c of the illusion created by the shorter sidewall tires on the 19" rims.