Turbosmart Supersonic Mazda / Subaru -Black (Order in)*NOTE* This product is not currently stocked in store, takes 2 5 working days to get in Listing is for: BOV5 Valve Assembly Yellow Spring Intalled (20 22 InHG) Vehicle Specific Flange & Gasket Turbosmart Decal The Bov5 from Turbosmart is a 38mm positive seal piston style valve based on our motorsport proven boost balance technology which means the more boost you feed this valve, the better it seals Simple as that! Manufactured from Billet Alluminium