This is just a thread on nasioc about a vender in the uk with a dry sump for the suby but it also has a youtube video of a sti (2.35L)on the dyno he claims 9300 redline for 12,500 miles so far. The 500hp is mostly from about 5.5k to 7200, it's still over 400 at 8700, 27 psi on 92 oct with meth. Subys only have about 430-450 lift max so the heads run out of air at about 7500.

http://forums.nasioc.com/forums/showthread...8714&page=3