A Universal Twin Piston Blow Off Valve with a Weld on Adaptor

We recommend servicing your valve every 3 years, or 20,000 miles, whichever comes sooner This twin Piston Blow off Valve is specifically designed for those that wish to install the valve by welding direct to a hard pipe installation, intake manifold, intercooler or similar. Available with a 25mm or 34mm adaptor which screws to the valve. Please select the adaptor required from the options above.   In The Box: 1 x FMDVWO25 or 34 Valve 1 x Adaptor (Aluminium or Stainless Steel) 1 x Uprated Blue Spring 1 x Uprated Red Spring 1 x Forge Sticker If you wish to tune this product to fit the needs of your engine, please see the spring tuning kit below.