What i find interesting the most, is how restricted the stock engine seems to be. If we know stock hp at the crank is 175hp, that's approx 141hp to the wheels. So with bearly any bolt-ons, to do 184hp to the wheels, how does an intake produce 43 hp? The hotside resonator delete, and the port and polish of the TB, should really only effect efficiency. Plus my recirculation valve is venting to atmosphere, not into the intake.
So i wonder if the rating we are following is incorrect. Maybe the Kona produces approx 175hp to the wheels. not the crank, which would put the gain from the intake mods at about 9hp, which is inline with the Injen Intake rating.
You did not get an OEM virgin starting point, that wouls of been nice. I assume you have seen this video? You do not have a downpipe I can assume. This video may help you figure stuff out.
What is the Kona's TB mm and what did you go to? Did you delete the coolant? Did you have to port the intake manifold to get a straight shot and no ridge? Just remember Hyundai will use "witness marks" against you in key areas, if you get ideas after seeing this video.