Ok to run GRP 12mm spacers just on the back?

[T6061]

Just looking for the stance but don't want to upset the apple cart. I figure the fronts already kick enough debris at the rear flanks as is but wouldn't mind having the rears further out. Now that Greg offers the silver version it would would look OEM with my silver wheels (almost ). Street car only...thoughts?

 

[kitkat]

12mm works front and rear, looks fantastic as well. If you really want an aggressive look 12mm front and 15mm rear fits at stock height and even a little lowered.