Everyone is opinioned on this. For the most part your engine expects the puff of air that the stock bov recalculates. If you take this away you casue the engine to run rich, which in turn could lead to problems down the line. My opinion is unless youíre running an aftermarket turbo where it is necessary for boost levels, stick with stock. If you want to hear a cool noise buy an aftermarket in take. Cobb makes one with a good sound.