i am referring to the F sport rear sway bar. i would like to keep everything OEM as much as possible.Are you referring to the F sport sway or did you have another one in mind? Do you have a link if it is a separate sway?
do you mean the original rear bar for IS 250 AWD is the same as the F sport bar for other IS? i believe there is also a F sport rear bar just for the AWD version.The F-Sport rear sway bar available for the IS250 AWD is the same as the rear bar available for the ISX50 F-Sport Sway Bar front and rear kit.
This bar will fit the ISF, has less compliant bushings and is thicker.
Lou