To be fair, blow off valves can have an effect on gaining power and performance of the car. If you get a cheap bov its most likely going to leak boost, or not be able to hold higher amounts of boost. This will obviously hinder power gains. You also need to decide between a stock style that recirculates back into the intake, or one that vents into the atmosphere. Each of these has different affects on the performace of the car. So there are things to consider other than just how good it sounds, or how ricey it sounds :biglaugh: