I only ask as this is an extremely popular, easy plug-N-play type mod for '10-'13 Outback/ Legacy owners that greatly improves the sloppy handling of those cars. I was wondering if the '11+ WRX models already come with the 19mm STi rear sway or exactly what size it is? and if anyone has swapped this part on their car? And if not can I buy the 19mm STi rear bar that the Outback/ Legacy guys are putting on directly to their cars to my '13 WRX, non-STi and improve some of the body roll when cornering? Any help greatly appreciated in advance.