245/40/18 is too tall for the front. We never recommend that size. We also recommend camber plates for anything over 225.
We recommend that, as it's the only way to cut down on all or most rubbing tire brand/model dependent. Obviously many people are willing to deal with some rubbing, and that's up to the owner to decide if they want to run something more extreme.
The correct 245's to run are 245/35/18. There is no performance advantage to the 40 sidewall as they cause numerous clearance issues.