Direct Fit Piston Recirculation Valve

The Forge Motorsport Direct Fit Piston Recirculation Valve is engineered as a direct replacement for your vehicle's original unit. This piston-based design offers enhanced longevity compared to OEM diaphragm valves, ensuring a more durable solution for your air and fuel system. Constructed with a full billet aluminum body and utilizing Viton high-temperature silicone o-rings for sealing, this valve is built for performance and reliability. It is lubricated with Mobil1 fully synthetic bearing grease and features a proprietary spring rate that can be tuned with optional spring kits to match increased boost pressures or engine modifications. The low-profile cap includes a 360-degree swiveling vacuum nipple for easier installation and allows for quick servicing without removing the valve from the vehicle. This valve is supplied with an uprated yellow spring, and a tuning spring kit is available separately if further customization is desired. Please note that for Porsche 997 Generation 1 models, two FMDVK04S valves are required.