Need some advice regarding rims and tires I plan on getting. I have a 2013 wrx HB with RCE springs. Will I need anymore modifications other than rolling my fenders if I put on Rota D's 18x9.5 +40 off set with 265/35's tires? Or would 18x8.5 +44 be better? I want the tire flush with the fenders. Thanks in advance once again.

 

Our offsets are a little different but you should be fine. I'm running 18x9.5s +38s with 255/35s on my 2011 sedan. I have room to probably even go 275 if I were ballzie, but might have to raise my coils a bit.

 

Also, Mach V has a nice thread on NASIOC about wheel fitment:
Guide to fitting wheels and tires to the 2011+ WRX - NASIOC