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Real experience
We test before we recommend.
PRODUCT DESCRIPTION
Alloy atmospheric dump valve for Subaru Impreza (1993-1995 models). Manufactured from aluminium, this atmospheric bypass valve vents the intake air into the atmosphere, creating the characteristic "whoosh" sound often associated with rally cars when lifting off the throttle. This allows for faster throttle response and higher clamping load to maintain boost pressure more reliably.
All Forge Motorsport twin-piston atmospheric valves have been designed and built with the intent of venting 100% of the residual intake air remaining in the forced induction system to the atmosphere upon throttle lift-off.
Forge Motorsport and its authorised distributors accept no responsibility for any adverse effects resulting from the installation of this valve on a vehicle whose engine management system, whether factory or aftermarket, is not capable of compensating for the loss of metered air through a vent-to-atmosphere valve.
Box contains:
1 x FMDVK013A valve
1 x S25-19 silicone hose
3 x 35mm hose clamps
1 x 20mm blanking plug
1 x Forge sticker










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.
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available products
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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.
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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.