Description: CNC machined. Allows the installation of a blow off valve. The turbocharger is the heart of any turbocharged engine. The turbine wheel of the turbocharger is driven by exhaust and condensed on the compressor side, here is to use the effect of thermal expansion. The angetriebe compressor wheel, the intake air is compressed and squeezed into the engine. When you close the throttle, for example if you switch the air creating pressure accumulates. Turbo charged vehicles have therefore installed a pressure relief valve, which is known as bypass valve, what is referred to colloquially as well as BOV or blow off valve. You can install a blow off valve this blow off adapter subsequently then on their hose. Specification: Material: Aluminum Connection diameter: 38mm Package Includes: 1 piece of BOV hose adapter flange Note: Please check your item model before purchasing to make sure it fits perfectly. Please contact us firstly if there are any problems with the product. The item's color may be slightly different from the pictures due to the light and screen setting difference. Please allow slight dimension error due to manual measurement.Thanks for your kindly understanding.