This is the 2.3 Boost specific PCV Valve used in the Mustang SVO. These prevent the boost from pressurizing the crankcase. Used in the Mustang SVO, these are also the replacement for the GT Turbo and Turbo Coupe Thunderbirds equipped with the 2.3 Turbo engine. This is a new Genuine Motorcraft part.
84-86 Mustang SVO PCV Valve