im with you, i have played with a few dynos in my time hub dynos always read high and any dyno can be played with to show more power to make a happy customer
depends on cams and head work auto or manual what rear housing?
but to make over 400kw at the wheels i would use a gt42r did one on a friends car and in comes on full boost at 4500rpm and has made and easy an 600hp on 98 fuel
hey bud i have used a cut standard one for the past 2 years without any problems and so have a some of my friends. your intake temps will drop by about 30 degress which = hp
i work for obriens the after market moulds are about $30 to $50 each depending what they use but to fit them probley you need to pull the windows out and there is a risk of braking them