SKU: FMDVK04S
- CNC machine body and internals
- Tuneable, for different boost pressures
- Serviceable, for lifetime use
- 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
- Covered by the unique Forge Lifetime Warranty *
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 Gloucester, 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. However, if you don’t want to service your valve yourself you can order the kit and ship your valve back to us and we will carry out the service free of charge! Simply contact us to arrange the service!
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
Free shipping for all orders over £200.
All products ship from our warehouse and workshop in Newbury, UK.
Fitting service available on all products at our Newbury Workshop - contact us to find out more and for a quote
All products come with 30 day no quibble returns policy - if you need to make a return, please contact us on +44 01635 450 91 or info@selectmotorsport.co.uk with your order number.
All returns must be unfitted and in as new condition with packaging undamaged
Race Use Only Disclaimer:
Unless otherwise specified, all products sold by Select Motorsport Ltd are intended strictly for race use only. These products are designed and manufactured for competitive motorsport purposes and are not suitable for use on public roads or for recreational off-road activities. It is the responsibility of the purchaser to ensure that the products are used in accordance with all applicable laws, regulations, and safety guidelines governing competitive motorsport events.
Select Motorsport Ltd does not endorse or condone the use of its products for any illegal or unauthorized purposes. The purchaser assumes all risks associated with the use of these products, including but not limited to damage to property, personal injury, and legal consequences resulting from non-compliance with applicable laws and regulations.
By purchasing and/or using products from Select Motorsport Ltd, the customer acknowledges and agrees to abide by this race use only disclaimer. Select Motorsport Ltd shall not be held liable for any misuse or unauthorised use of its products.
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