1. Provides the desired atmospheric blow-off valve sound and increases the high performance of turbo engines 2. Improve the turbine response, release additional charge air into the atmosphere instead of directing it back into the engine line 3. The valve can be easily adjusted by turning the top of the valve to adjust the spring pressure while it is mounted on the vehicle 4. High-quality CNC billet aluminium alloy construction, corrosion resistant, reliable for long-term use 5. This blow-off turbo valve comes with connectors and hose and is complete and easy to install Specification: Features: Provides the desirable atmospheric blow-off valve sound and improves the performance of turbo engines. High performance. Improve the turbine response by releasing additional charge air into the atmosphere instead of directing it back into the engine line. The valve can be easily adjusted by turning the top of the valve to adjust the spring pressure while it is mounted on the vehicle. High quality CNC billet aluminum alloy construction, corrosion resistant, reliable for long-term use. Comes with connectors and hose, this blow-off turbo valve is complete and easy to install. Specifications: Condition: 100% Brand New Material: aluminium alloy. Colour: black. Shape: horn shape, round (optional). Size: 85 x 72 mm / 3.3 x 2.8 inches. Outer Diameter: 25mm/1" Package weight: 318-325g Features: universal. Package list: 1 x blow off valve. 2 x adapters. 2 x clamps. 2 x hose.