So we took the car to UMS Tuning to take care of the tuning. Tony worked his magic and the car made 416whp at 17.75lbs of boost. Considering the application of the car (road racing) we pulled a bit timing just to play it safe and ended up at 396whp and 354 ft/lb. Should be plenty of power for a 2400lb car. Dyno video link at bottom. Sound quality questionable...
Subaru Powered Boxster dyno tuning - YouTube