I was wondering how much boost the stock blow-off valve can handle cause I'm pretty sure I'm getting some boost leak at high speeds... also are any blow-off valves really better than the others or should they all basically work fine?

 

You could use the stock ones, as some people have run 18+ psi on them. Eventually they will leak. I would just get something big an functional like a tial. Its only like two bills and some change. Also has a nice powerfull woosh sound to it. Not quickly and ricy like some of the japanese ones. The greddy type R is also nice.

 

yea my friend has the greddy one on his wrx and it sounds nice. he had a blitz but it leaked bad he said. anyone know if the apexi blow-off is any good? it is at a good price and most of their stuff is good quality so I assume it is