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Real experience
We test before we recommend.
PRODUCT DESCRIPTION
When Ford launched the Escort RS Turbo, Forge developed and pioneered the dump valve technology to offer Escort owners the same technology Cosworth had implemented in the Sierra – with a loud sound and longer turbo life, this is without a doubt a favourite modification of Ford enthusiasts, a must have product.
With the engine not incorporating a bypass valve from the factory, Forge have developed a twin piston dump valve that not only gives you an incredible loud sound when lifting off the throttle, but also improves your throttle response during gear changes by reducing turbo lag. Its design helps the turbocharger maintain its rotational speed ready for when you accelerate, while also reducing the stress on the impeller. Without removing this stress, your turbo could suffer from premature failure, especially on modified engines and vehicles running modifications. Our dump valve kit includes two types of springs with different spring rates to suit both stock and stage 1 setups. We also have additional springs for stage 2 and above, which can be ordered via our website depending on your vehicle’s engine modifications including hybrid turbo conversions. In the box:
1x FMDV35 valve with yellow spring
1x 4mm vacuum tube (0.5m)
1x vacuum T piece
3x hose clamps
1x machined coupler
5x cable ties
1x uprated blue spring
1x bespoke silicon hose
Features:
The Forge Motorsport solution comes with all the hardware needed and step by step instructions for any enthusiast with the appropriate tools to fit at home in a couple of hours. CNC machined couplers and components. CNC machined twin piston Forge valve. The silicone hoses in this kit have been designed to include an expensive inner liner of modified silicone, known as fluorosilicone. This means the hoses are suitable to be used with either modern long-life coolants, OAT coolants or air containing oil mist. The construction of the hoses has been engineered to exceed that of the OEM fitments and will enhance any engine bay both technically and aesthetically. Lifetime warranty. The Forge valve will not activate any check engine light (EML).
Compatible Vehicles:
Ford Fiesta Mk8 1.5 ST
Ford Puma ST










WHY THETUNERLAB
We have spent years building cars, racing, and testing the exact same parts that we sell.
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We test before we recommend.
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We help you choose the right part.
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Only trusted manufacturers.
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Before and after the purchase.
+10 years
of passion for drifting
+30.000
available products
+5.000
satisfied customers
24/7
passion for motoring
Each product indicates compatible models in the product description. If you have any questions, you can contact us and we will help you choose your best option.
-If the product is in stock, the usual delivery time is 2 to 5 working days.
-If the product is out of stock, the delivery time is 7 to 15 working days.
All our products come with the manufacturer's official warranty and comply with current regulations.
Yes. We ship orders to Spain and most European countries using specialized transport agencies.
You can contact our team via WhatsApp, email, or our website's contact form.
Shipping costs depend on the type of product, its weight, dimensions, and the destination country. In most cases, the amount is calculated automatically during the checkout process before the order is finalized.
For some products, especially large items or those with special characteristics, shipping costs may require a manual review. If the amount shown does not match the actual shipping cost, we will contact you before processing the order to inform you of the final cost and request your confirmation before proceeding. We will never charge any additional fees without your authorization.