Our alternative is a fully engineered solution, offering significantly improved reliability. Our valve and installation kit replaces the original unit with a pressure/vacuum operated piston valve, that still also retains the desirable OEM ECU control over valve actuation. This product has been thoroughly designed and tested with the expressed intent of offering improved valve response and maintaining ECU control while resulting in absolutely NO fault codes, NO check engine lights, and no adverse effects of any kind. All of the necessary components and detailed instructions are included and everything is designed to make installation as simple as possible.In The Box: 1 x FMDVST180 Valve 1 x FMBGFK4 Boost Tap and Bolt 1 x Solenoid, Bracket and Screws 1 x Blue Spring (Uprated) 1 x Wiring Harness 2 x Posi-taps 10 x Cable Ties 1 x 2000mm Length of 4mm Vacuum Hose 1 x Forge Key Ring and Sticker 1 x Instruction Booklet. If you wish to tune this product to fit the needs of your engine, please see the spring tuning kit below. Mods4U is a small family run business who have been working within the modified car parts scene for some time. Please be aware that some of our items are made to order and can carry extended lead times. Upon receipt of your order please check the package and contents. We are a small business and as such there may be occasions when we are unable to fulfil the order due to issue out of our control so please bear with us!