Company: Forge Motorsport

Dump Valve for Subaru Impreza 2001 Onwards

Product code: FMDVSUB01

Prefer to talk over the phone? Call us +886-4-22516887


Product Description


  • Made from billet aluminium for durability
  • Hand polished in the UK for a sleek appearance
  • Creates the iconic "Whoosh" sound associated with rally cars
  • Improves throttle response
  • Increases clamping load to maintain boost pressure reliably

An Alloy Atmospheric Dump Valve specifically designed to fit Subaru Impreza models from 2001 onwards, including the 2009 GR STi. This high-quality valve is made from billet aluminium and hand polished in the UK to ensure durability and a sleek appearance. By installing this atmospheric diverter valve, you can experience the iconic "Whoosh" sound that is commonly heard in rally cars when the throttle is lifted. Not only does it add an exciting auditory experience, but it also improves throttle response and increases clamping load to maintain boost pressure more reliably.


In The Box:

1 x FMDVSUB01 Valve
1 x 34mm Blanking Plug
1 x Forge Sticker

If you want to customize this valve to better suit the needs of your engine, we offer a spring tuning kit that allows for easy adjustments. If you have any questions or are unsure if this product is suitable for your application, feel free to contact us for assistance. 


Check your vehicle compatibility: Click here

Please Note: In line with our policy to constantly review, revise, and improve our product range, the appearance of the product you receive may differ from the one advertised.

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Compatible Vehicles

Click the triangles to find your car make and model. Note that the models listed here have either had the part fitted by us or a customer or they are listed as being compatible on industry parts databases. Where it has not been directly fitted by Forge there will then be a separate May Also Fit tab where the make and model will also appear and which details our no-risk approach to purchasing this product, so it is worth checking there as well.

If you need further assistance, please call us on +44 1452 380999 or email us.



Dump Valve for Subaru Impreza 2001 Onwards


All Forge Motorsport products come with a limited lifetime warranty. All warranty claims must be accompanied by the original proof of purchase to enable us to help you. Failure to supply this proof will result in your claim or enquiry being denied.

For further information, please contact our customer service team.

Do not use aggressive (acidic) car cleaning products, particularly traffic film remover solutions or shampoos to clean your intercooler, radiator or oil cooler. The use of these products can damage Forge Motorsport cooling systems and invalidate your warranty. These are often found at car washes. A light, warm, soapy solution (free of harsh acidic cleaning compounds) should be used to clean you cooler and thoroughly rinsed away. We recommend that you should inspect your product on a regular basis for bent and/or crushed fins. Any bent fins should be carefully straightened to allow ambient air to pass through the core face. At the time of installing your Forge radiator, an approved coolant must be used and added to the coolant system. Be sure you never mix coolant and always use distilled water.



Shipping Charges & Services

We will contact you after your order is placed to advise of available shipping services and costs and to take payment from you.

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