You would be struggling...
The front '08 STi are pretty similar to the 05-07STi 114.3 hubs but I doubt they are interchangeable.
The rears won't fit your wrx since the '08+ uses the 'liberty' style rear suspension.
Your best bet is get a full set of '05-07 sti hubs and that's straight bolt onto your car but then you need different front shocks and possible driveshaft swap.
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MY00 GT Forester with STi goodies
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