Description
Product Description
We recommend servicing your valve every 3 years, or 20,000 miles, whichever comes sooner
As we endeavour to continue our innovation, existing products are no exception. Therefore, we have now released the all new version of “FMDV004.” It has been difficult to improve upon this market leading design, but we have done just that, offering improved dual piston action with increased response time resulting in an very audible blow off sound when the throttle is lifted. In addition, we now include an extensive fitting kit for easy conversion from a stock recirculation valve to this compact blow off valve.
Highlights:
- Improved external aesthetics
- A myriad of incremental engineering enhancements to all internal components have been carried out to offer faster response times and longer service intervals
- The piston uses heat stabilised Viton O-rings
- A super durable and responsive aluminium piston
- A fully serviceable valve that is rebuildable in minutes
- Covered by the unique Forge Lifetime Warranty*
*Terms and conditions apply.
In the Box
1x FMDV15 Atmo Valve
1x Length of silicone hose
1x Silicone blanking cap
1x Brass T-Peice
1x 25mm Ally Blanking Plug
2x Hose clamps
10x Cable ties
1 x Forge Sticker
Please note that all Forge Motorsport Dual-Piston Atmospheric Valves have been designed and built with the intent of venting 100% of the residual charge air remaining in your forced induction system to the atmosphere at throttle lift. While we have incorporated many elements into the design of the Dual-Piston valves to aid in their compatibility with mass air-flow sensor equipped vehicles, we cannot always guarantee that everyone’s application will be compatible with a valve that vents the charge air into the atmosphere.
Forge Motorsport nor any of its Authorised Distributors can assume any responsibility for any adverse effects resulting from the installation of this valve onto 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 such as this.
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
Instructions

Atmospheric Dump Valve for Micra IG-T 90 Tekna and Renault Clio 0.9 TCE
Warranty
Warranty Infomation
The majority of Forge Motorsport products come with a limited lifetime warranty (brakes pads excluded). 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 call our customer service team on +44(0)1452 380999 or email info@forgemotorsport.co.uk.
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.
This warranty does not apply to any defect in the goods arising from fair wear and tear, wilful damage, accident, negligence by you or any third party, use otherwise than as recommended by the supplier, failure to follow the supplier’s instructions, or any alteration or repair carried out without the supplier’s approval.
Shipping
Shipping
UK Mainland
Next day delivery applies to orders processed before 12 noon Monday to Friday, subject to stock availability and geographical restrictions. 'Next day' refers to next working day. We cannot guarantee next day delivery for orders placed after this time. Whilst we endeavour to honour our next day service, next day delivery cannot be guaranteed due to other extenuating circumstances. Full details
Delivery is free of charge for all orders £200 (ex VAT) or over. Products are sent by standard DPD service which is usually a next day service, but can take 2 days in transit. We reserve the right to ship smaller, lower value items via Royal Mail or any other service. (Not including Scottish Highlands, Scottish Isles, Northern Ireland, Guernsey, Jersey, and Isle of Man where charges will vary).
Europe and Worldwide
Delivery service charges will vary depending on the quantity of product ordered, the related parcel size, and destination postcode. Live shipping rates will be calculated at checkout using ShippyPro and dependent on criteria, you will be given the option of DHL, DPD, or FedEx courier services.
Shipping into the EU - Duty Charge Information
All Forge products are sold with a Delivery Duty Unpaid (DDU) status and an import tariff may apply to your order. Customers will be contacted by the Customs and Excise authority in the destination country regarding payment prior to delivery, and it is important that correct contact telephone number and email information be submitted with the order to facilitate this part of the delivery process. Some couriers are charging an admin fee for shipping into the EU.
If we detect at checkout that you are located within the European Union (EU), you are eligible for a contribution towards your import duty and tax payments. We can add an additional 20% on the total cost of your order, we will then pay the duty and tax costs above your contribution. This offer will ensure the price you pay at checkout is the total you pay, with no additional charges. It will also ensure you have the fastest possible delivery, with no delays. For more information, please see here
Our shipping methods ensure safe and timely delivery of your new Forge products. For further information on cost and delivery times, please contact Forge using the info@forgemotorsport.co.uk email address if you require any more information. We reserve the right to change the delivery service and company at any time.
Forge Motorsport ships via either UPS, FedEx, DHL (primarily for outside of UK), DPD (primarily for UK), or any other courier we chose. Other shipping options may be available for an additional fee over and above the actual shipping costs. Once a product has left our warehouse and is in the possession of the shipping company, any claims must be made directly with that shipper however we can assist with most cases.
FAQ's and other info can be found here.
Expert Answers
I recently purchased this kit from you guys along with an induction kit and it is perfect for my Renault tce 0.9 2019 mk4, please could you tell me the inner diameter of the silicone tubing for the atmosphere dump valve as want to replace with blue instead of the black. Thank you
The vac hose is 4mm silicone and can be purchaced from our website.
Hi, I am looking to fit this part onto my Dacia Sandero 2015, it has a Renault 0.9 TCE engine. I've read on some forums that parts like this can make the engine run rich and lose power due to air releasing into the atmosphere and not being recirculated, is this true? Does this part make the 'woosh' sound? Also is a tune required after installing this part? Thanks alot. Regards from Luke
Hello Luke
We have not seen any issues with this valve making the car run rich.Some atmo valves can make a car run rich but not with this engine.
Yes it will make a whooshing sound inbetween gear changes.
This product will work fine with standard software or mapped vehicles.