The performance and sounds are very similar to stock. The only sound difference I have is sometimes I get a flutter sound depending on the boost level when the gas pedal is released. I am going to try to play with the vacuum lines and pre-load to see if I can get rid of the flutter sound. If I would not have got the BOV used I think I would have wasted my money but I only spent 100 dollars so I am happy with what I got. I really think the only time you will see a performance change is when your stock valve was leaking.
I got to take the car to the track today and I just want to warn everyone that they might want to check that the snap ring is in the groove very well. My second run going down the track my BOV decides to blow off, I was lucky enough that when that happened the o-ring stayed in the engine compartment so I could put everything back together. Does anyone have an ideas to get rid of the flutter on the valve? I have tried to back the screw out on the valve and that seemed to do nothing
