Type-S Red Blow Off Valve BOV Adjustable PSI + 2.5" Aluminum Adapter Pipe SetBlow Off Valve 100% Brand New Item, Never Used or Installed Works with Any Turbo Application (Requires Flange Fitting Kit **Note Included**). These Blow Off Valves Are Easily Adjustable To Prevent Both Premature Boost Leakage And Compressor Surge. The Spring Stiffness Adjustment Screw And The Two Different Size Give The User The Option To Match Vehicle With Mild Upgrades To Heavily Tuned Engines. Oval 2 Bolt Flange Design type. It Can Hold Up To