both bov are knock offs, but worked great at both uses. i am still using the greddy type s and it acts and sounds amazing. the blitz bov is a knockoff as well, it function great as well. the blitz is missing a spring and it is already welded to an aluminum T. the type s is currently on the car. am willing to trade both plus 50 bucks for a real HKS not fake. someone help a brotha out!!!!!!

 

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