So, based on the replies, this is how I see the breakdown:
Plastic Turbo Intake on Turbo car = 8-10 HP increase due to better airflow distribution and plastic intake stays cooler.
Metal Turbo Intake on N/A PT = some HP increase, may not be noticable. Hard to install on N/A.
Plastic Turbo Intake on N/A PT = More HP increase, but still may not be noticable, due the the fact that N/A already has a plastic manifold. Air flow distribution amount on N/A is still in debate. Install is still difficult.
If you add the Plastic Turbo Intake on an N/A, please let us know the results and keep us posted. I'd like to know whether this mod is worth the effort.
