Features: 1.High precision aluminium valve body finished in anodised metal 2.Built-in spring prevents premature action under high boost 3.Adjustable spring tension to handle different boost levels 4.Return pipe can be used to prevent venting to atmosphere 5.25mm port, universal design. Made by professional manufacturer, quality assurance Specification: Description:_x000D_ Blow off valves are designed for eliminating compressor surge and preventing premature boost leakage, while increasing boost response between shifts. Each valve is made of billet aluminum frame and provides excellent performance that cheap piston types cannot offer. _x000D_ _x000D_ Features: _x000D_ _x000D_ High precision aluminium valve body finished in anodised metal. _x000D_ Built-in spring prevents premature action under high boost. _x000D_ Adjustable spring tension to handle different boost levels. _x000D_ Return pipe can be used to prevent venting to atmosphere. _x000D_ 25mm port, universal design. _x000D_ Made by professional manufacturer, quality assurance. _x000D_ _x000D_ Specifications: _x000D_ Material: Aluminium _x000D_ Color: Black_x000D_ Port Size: 25mm_x000D_ Fit: Universal_x000D_ Package Weight: Approx. 200g_x000D_ _x000D_ Package Included: _x000D_ 1 x Turbo Blow Off Valve_x000D_ _x000D_ Note:_x000D_ It is easy to install, but professional installation is highly recommended. PackageList: