You would think that the Falken FK-452 would be more narrow than the Toyo T1-R, but member "Money99" has found out other wise. He tried to use the FK-452 as a replacement for the T1-R because they are backorder, and he said they are rubbing where his T1-R did not. You might want to PM "Money99" if you have any further questions to see if you might be running similar fitments and if you might run into similar issues.
Here's a link to his thread -
http://www.e90post.com/forums/showthread.php?t=127722