Forge Motorsport Direct Fit Piston Recirculation Valve
Forge Motorsport Direct Fit Piston Recirculation Valve. CNC machine body and internals. Tuneable, for different boost pressures.
Easy Fit, full step by step installation instructions provided. Utilising world leading springs for more precise operation and consistency. Assembled with heat stabilised Viton O rings. Lubricated with Mobil 1 high temp grease.
This recirculating valve is a direct replacement for the OEM valve but offering a level of reliability that is second to none! The vacuum nipple is position is angled making the upgrade/replacement seamless. We take pride in producing valves that have significant advantages over to original equipment: the body and internals are machined in our workshop in Dorset, UK. They are then hand polished or anodised black for the stealthy appearance.If stealthy isn't your style and you want the infamous dump valve noise, take a look at our atmospheric version: FMDVK04SA. Please note for Porsche 997 Generation 1, x2 FMDVK04S's are required. Product demonstrated in the photo above fitted to the turbo features FMDVK04D, the same valve with a top exit vacuum nipple.
The OEM valve uses a rubber diaphragm and a plastic housing. Both of these materials, but especially the rubber is prone to failure.
The rubber can stiffen and go brittle due to the heat from the engine, resulting in the diaphragm splitting and boost leak. Our valve uses full billet alloy construction with a piston based internal design, meaning the issues with the OEM can never happen with ours!
To give you even more peace of mind, we made the internals of our valve serviceable. We recommend doing these every 3 years or 20,000 miles, whichever comes first. The OEM valve internals can also fail if you have your vehicle mapped as the rubber diaphragm is not always strong enough to cope with the increased boost pressure.
We build our valves with a spring matched to the original pressure of the car but include in the kit a spring strong enough to cope with a stage one remap. If you decide to increase the power even more, you can guarantee the reliability of our valve by using this spring tuning kit! In the Box 1 x FMDVK04S Valve 1 x Uprated Yellow Spring 1 x Forge Sticker. Mods4U is a small family run business who have been working within the modified car parts scene for some time. 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!