Careful, Raceline 6+1 are NOT 6+1. They are marketed that way so unsuspecting people will buy them. They are more like 5+2 and some are even 4+3.
As a matter of fact, none of the 6+1 are actually 6+1. The closest is the STI HD9 at 50 mm offset and the System 3 S-B4 at 45 mm offset but those are both beadlocks.
The closest non-beadlock wheel I have found is the System 3 ST-3 at +40 mm offset. These would work fine but will widen you up a little and you will need spacers in the rear.
NEVER go by the X+Y offset, that number is a marketing ploy. Always use the true offset when looking at wheels.
To stay as close to stock width, try to find something as close to +50 mm for the front and +15 mm for the rear if not using spacers.
Or use +50 mm all the way around and 1.5" spacers in the rear.
On the X4, anything larger than 30" will rub in the front. Some rounded tread 31's will clear but the more square tread 31's will rub.