Hopefully, Toyota and Subaru has design the front Macpherson strut to the newer super strut design like the Ford Focus RS in Europe. The inclination angle is not inline of the pivot points. which gives a different scrub radius than typical Macpherson. I believe the Porsche Cayman design their Macpherson stut this way, the reason the Cayman handles very well.
The FR-S will not fit in the "ST" class because of the limited slip. It should fit the "STX" class well.
I also want to try it in the stock class. More likely to be classed in
D-stock.
http://www.autolinedetroit.tv/journal-wp-content//uploads/2009/02/revo-knuckle.pdf
Even though Ford design this for a front wheel drive to cure torque steer, it still can advance the steering feel for macpherson strut.
Cliff
369 st civic