Features: This exhaust valve gasket will provide your vehicle with the traditional BOV sound, and the-inventory DV will be reserved. When you release the throttle, you can get a sweet and satisfying "swish- sound" that will make everyone Everyone knows that your vehicle is-actually turbocharged. The exhaust valve gasket is-made of strong aluminum alloy material. High-quality materials not only make the product light in weight, but also wear-resistant and durable. The spacer is-a pressure release system that can be used with the stock diverter valve to vent extra-boost air into the atmosphere instead of sending it back into the engine's-intake piping. Allows charge air to be recirculated around the turbo charger from the boost side back to the intake side. By fitting the adapter between the existing solenoid and the turbo housing (this involves removing only 2 bolts) the air is re-directed to atmosphere rather than recirculated. Specifications: Material:Plastic+Metal Size:As Picture Shown For 308 Mini R56 57 1.6T Note: .Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. .Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. Package includes: 1x Pressure Relief Valve