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Description
Product Description
These are the individual springs sold in our FMDVTUN kit. Please select the colour you require using the options above.
Valve Spring color coding: Green - 5-15 PSI, Yellow - 15-23 PSI, Blue - 23-30 PSI, Red - 30 + PSI
*The above figures are estimates and should only be considered as a guideline*
Note: The quoted spring pressure (PSI) relates to the un-assisted clamping force of the spring and should NOT be taken as an equivalent to boost pressure when determining suitability. Once a valve is fitted to a car it is subjected to various pressures that act upon the diaphragm or piston to aid its respective ability to seal or hold boost. An example of this, would be when using a FMCL007P valve on a 1.8T engine as found in the TT 225hp. The boost pressure on a "chipped" car can peak at 26psi. The recommended spring would be the Green or Yellow.
Note: Serious or fatal damage may occur to the engine and associated components if this product is incorrectly matched to the individual engine requirements. Forge Motorsport nor any of it’s Authorised Distributors can assume any responsibility for any adverse effects resulting from the installation of this product.
If you are unsure if this product is suitable for your application, please contact us.
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.
Product Reviews
Product Reviews
Great customer service and item well made and easy to install
Yellow spring for Impreza dump valve arrived early and staff very helpful
Spoke to Kris at Forge as my LCR was running too soft a spring for the boost, he sent me the link for the correct spring, and wow what a difference!! No boost bleeding off and it now sounds even better!! Very happy customer and would use Forge again
Ordered this to replace the spring in my oo7p! I was unsure what colour I had but knew I needed a yellow spring! Forge sent it out rapid and it arrived quickly too! Great service and cheaper than third party shops like awesome gti etc!! 10/10 would recommend.
Ordered this to replace the spring in my oo7p! I was unsure what colour I had but knew I needed a yellow spring! Forge sent it out rapid and it arrived quickly too! Great service and cheaper than third party shops like awesome gti etc!! 10/10 would recommend.
Easy to understand guide to selection, quick delivery and easy to fit.
Boost is now holding correctly at high RPM's.
Fast delivery. Used the guide to select Spring. Works perfect
Excellent support from the team, try to understand the situation before providing you with any item.
After some confusion regarding the product after it arrived and a hastily left 0 star review, the MD of the company got in touch and explained what had happened. Excellent service as always, always use Forge.
I had a bit of trouble selecting the spring but the Forge Motorsport team were a great help when i spotted my mistake and they were very quick to sort the problem out. Great product and works really well. Very happy customer. Would definitely recommend to anyone.
I had a bit of trouble selecting the spring but the Forge Motorsport team were a great help when i spotted my mistake and they were very quick to sort the problem out. Great product and works really well. Very happy customer. Would definitely recommend to anyone.
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Compatible Vehicles
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
Does this fit the Forge recirculation valve for Corsa VXR?
No, the correct spring specification (size) is the part number FMSS114.
Is this compatible with FMDV35?
Hello
Yes this product is compatible with your dump valve.
Are these direct replacements for the FMDV21 for ZC33S??
Yes the spring specification FMDVSU110 is compatible with the FMDV21 valve for the Suzuki Swift & Vitara (1.0 & 1.4 BoosterJet & Sport) models.
What psi rating is the white spring?
Depending on application this spring should be sufficient to support over 3 bar of boost
I have the FMDVMK7A-8LA Valve and my car is running stage 3, do I use the blue spring that's supplied or do I need the red. If so is this the right one (Product code: FMDVSU110)
Hi Nick, i would try fitting the blue spring and as long as it holds boost and the valve does not leak air on acceleration then it will be fine. for any reason the blue spring is not sufficient then the part number you will need for the red spring would be FMSS114
I have attached a link below, you will just need to select red from the drop down menu
https://www.forgemotorsport.co.uk/Uprated_Small_Spring_Single--product--833.html
What is the outside diameter of this spring and the overall length under no compression? Thanks
The outside diameter is 35mm, and the height under no compression is 39mm.
