Lol no need to get pissed off about it, just said it looks terrible. It's not like you made it and im saying your work is shit.
Whether it made 500HP is irrelevant, you can do that on the stock plenum (for reference the Plazmaman one is rated at 1000HP worth of flow, in other words its "horsepower flow" is irrelavant.)
Its just a stock plenum that has been cut up and made into a foward facing plenum (as many people do) but he has changed the centre of it completely, however do you think it has been created to flow well and R&D put into it to flow as evenly as possible like a Plazmaman or Greddy one would? Just saying. It may flow well, it may not, hence my "questionable" comment.