Forge Motorsport A Twin Blow Off Valve Kit for the GTR Nissan Skyline FMFK055We recommend servicing your valve every 3 years, or 20,000 miles, whichever comes sooner A complete kit including everything that you will need to install Twin Blow Off valves to your R32 33 34 Model Nissan Skyline GTR. In The Box: 2 x FMFK055 Valve 1 x 2000mm of 4mm Vacuum Tube 1 x 51mm Blanking Plug 2 x 80mm Hose Clamp 6 x Cable Tie 1 x Forge Sticker If you wish to tune this product to fit the needs of your engine, please see the spring tuning kit