I just got a quote from tire rack. 18''X9'' offset 46mm black Enkei PF01(dont need spacer to clear brembo) with cap and wheel nuts $2100(inc taxes) shipped, $3500(inc taxes) if you want tyre pressure monitors and 245/40/18 Dirreza Z2(all fitted and balanced).

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MY08 STI 422whp at 1.5bar on E85, built by Diversion Garage, assembled and tuned by EvoR

Update from new owner: 375whp at 1.4bar on 98, at Tokyo Motorsport