Company: Forge Motorsport

Valve Small Spring Tuning Kit

Product code: FMTVTUN
£27.55 Inc. VAT £22.96 Exc. VAT (VAT will be added during the checkout process) Estimate Delivery

Please select options and qty below:

Check your vehicle compatibility

Have A Question?

Prefer to talk over the phone? Call us +44 1452 380999


Product Description

This kit contains a range of springs suitable for tuning many Forge Motorsport products. This kit can also be used in combination with our FMDVTUN spring kit for the tuning of our twin piston atmospheric blow off valves. Four springs are included within the kit.

Valve Spring Colour Coding: The weakest spring is GREEN, followed by YELLOWBLUE, and RED which is the strongest. Depepending on the supplied original fitment, this represents an increase of 25%, 50%, 75%, and 100% respectively.
*The above should only be considered as a guideline*

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. 


*Please Note - The colours of the springs illustrated may differ to what you receive. All spring kits are brand new but are not sprayed. Colour is used as an identifier*



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

Be the first to review this product

Want to leave a review?

Login Register FREE!

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.



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

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.



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 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

Submit Question Cancel
Submitted questions may be published on the website.

Hi, I need a red spring for my FMDVMK7A if possible? Are these available please. Also a service kit too. I found this FMSS114 but wasn’t sure it’s correct. Thanks

FMSS114 is the correct spring size specification for the FMDVMK7A (select red from the options menu), and search for the product code FMDVSK (valve service kit page) where the FMDVMK7A service kit can be selected from the options menu.

Hello, is it suitable for the FMDV38?

Correct, the spring tuning kit with product code FMTVTUN contains the correct size spring specification for the dump valve with part number FMDV38.

I have a 1.0 tsi blow off I'm running yellow spring tuner told me the spring is too weak can I go higher and wich do I need


The next spring is the blue which is recommended for tuned vehicles. 

I have a VW Scirocco 1.4 TSI and equipped with your blow off valve FMDVA1TSI. These springs are correct right?

Yes, the FMTVTUN spring tuning kit contains the correct spring size specification for the FMDVA1TSI dump valve.

Will this be correct springs for my polo 1.2 tsi forge blow off valve?

Please confirm which valve you have ? FMDV1 ? 

Spring for Skoda fabia VRs hatchback 1.4 twin charged

Please explain what you require ? Do you have a forge valve for the vehicle in question ? 

Will this be the correct kit for my mk5 golf gti forge dv?

Hi James, thank you for contacting us, yes these are the correct springs for your valve sir.

Hello, is it suitable for the FMDV008?

No, the part number FMDVTUN is the correct spring kit specification for the FMDV008.

Hello will these springs fit FMWRX301 valve?


No these springs are NOT compatible with this valve. 

Will these springs fit this part number FMDVK04D I have astra h vxr z20leh engine code

Hello. Yes, these springs will be suitable for your valve. 

Would these fit the FMDVDS3A? If so. How do I tell which spring I should use for what boost? Thanks


Yes the small spring is the correct spring for this valve.

Hi. I have the FMDVMK7R recirc valve on a Mk7.5 VW Golf R…will this spring kit fit the valve I have? Cheers!


Yes this is the correct spring kit for the FMDVMK7R valve.

I have a new age big fmdvsubo1c with small spring broken don’t know what spring to use with green big spring

Good Evening Andrew,

You will require FMSS114 - Standard for your FMDVSUB01 valve. I have attached a link below for ease of ordering for you sir.


Kind Regards