mainstream is pretty much the only place in GA that has experience in tuning the knee0ns and they are VERY good at it.

dont go over 18lbs untuned. get injectors and tune to run more boost. the turbo dies off making WHP after 20psi but keeps making WTQ. my black one tuned by mainstream make 297WHP and 360WTQ at 22psi. the turbo is too small to hold the boost. it will spike 22psi but by redline it will fall off to 15-16psi.

srtforums.com has all you answers