3" Ssqv Sqv Reinforced Silicone Jdm Style Turbo Bov Blow Off Valve Adapter Red Adapter for SQV/SSQV blow off valve. This Blow Off Valves Adapter is 3" Inner diameter. Fully reinforced silicone coupler with SQV/SSQV type flange. It Can Hold Up To 750 Or 28 PSI Of Boost Pressure. Professional Install Suggested if not familiar with install. Installation guide not included.