TurboSmart Race Port Blow Off Valve in Sleeper black color (PN:0204-1002) Custom fitment required. Featuring a massive 52mm inlet, the Race Port is Turbosmart’s largest and highest-flowing blow-off valve. Flowing up to 100% more than its nearest competitor, the Race Port is ideal for high horsepower, turbo or supercharged racing applications. Lightweight and compact, it fits easily into small, space-restricted engine bays. Comes complete with a quick-release V-Band Clamp, Silicone Nomex Diaphragm, Viton Piston Seal and an aluminium Weld Flange.