When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
You got the kit that doesn't require mini-tubbing, so of course they're gonna stick out. You can't stuff 18x12s in the wheelwell without either rubbing or sticking out of the well.
The fronts are probably going to be worse. 18x11 in front is crazy.
It is a 'race' setup afterall. Why didn't you get the street setup instead if you're not actually racing? 18x10.5-11.5 and 18x10 up front.