The steering rack in my 2004 FXS is giving out, so I figured that I would replace it with a refurbished one from an 04 STi (part no. 34110FE431). As far as I can tell, this part should fit without issue. However, it seems that everyone who has done this swap has an XT. Will the XS power steering pump work with the STi rack, or will I need to upgrade the pump as well?