Boost is hitting around 13 or 14, then dropping off, havnt really watched the gauge yet, its got k&n filter, wog cooler, 42lb injectors, ballistic 100cpi cat, walbro 340 fuel pump, so you can see why is expected more power but as Matt said the actuator is letting it down, on a cold day it would prob hit 270 kw, but the mid range is amazing which is what I want, Matt is a great guy and becoming a great tuner, il be doing the actuator and going back to him, that should keep me happy until I upgrade, yeah the GS is wild