I apologize if this question has already been answered on here, which I'm sure it has, but I have a 16 sti and am looking to get a blow off valve or bypass valve. Question one, is there a difference? Question two, is it possible to install an aftermarket valve with NO tune and not have problems? And question three, what would be the best brand to go with in your opinion? Thinking Cobb or Turbosmart, but that's only from brief researching.