Will the RSE12's fit my 2009 MCS if I have KW V1 coilovers installed I already ordered them and a set of 215/45/18's. Worst case I'll run a small spacer just curious what you guys think

 

Forgot to mention the wheels are 18x7.5 +45

 

Based on my personal experience (I'm no expert). I feel that you will be either rubbing or extremely close to the coilovers. I had 16x7 +20mm on my previous car and it was certainly close (before I put my coilovers on and lowered it).