The GFB Respons TMS blow-off valve is a universal, weld-on unit that lets you infinitely vary recirculation versus atmosphere venting to tune sound and behavior. Using GFB's TMS technology, it improves boost recovery on shifts and is rated to hold extremely high boost pressures. An adjustment ring changes the venting bias so you can go from silent recirc to full atmosphere sound while maintaining drivability.
GFB Universal Weld On Respons TMS Fully Adjustable Sound BOV/Diverter