emusa Blow Off Valve BOV 2.5" Silicone Coupler Tube Hose Pipe Type RS Flange Adapter Turbo Charger (2.5", Blue) Reinforced silicone 2.5"OR 3"+ Type RS/Type S BOV 6" Length Direct bolt on to any 2.5" OR 3" O.D. Pipe Triple reinforced silicone able to withstand high