Company: Forge Motorsport

Hyundai i20N Atmospheric and Recirculating Dump Valve

Product code: FMDV37
£200.50 Inc. VAT £167.08 Exc. VAT (VAT will be added during the checkout process) Estimate Delivery

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More info Hyundai i20N Brake Lines - Read More
More info A replacement oil cap for multiple applications. - Read More

Have A Question? Read Instructions? How to Service Your Valve

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


Product Description

This part replaces OEM Part No. 28234-2S300


  • Utilising world leading springs for more precise operation and consistency
  • All internal and external components have been made in the UK, ensuring top quality, and offering a valve with faster response times and longer service intervals
  • The piston uses heat stabilised Viton O-rings
  • Lubricated with high temperature Mobil1 grease to ensure a long life with minimal wear and very long service intervals
  • A super durable and responsive aluminium piston
  • Fully serviceable and rebuildable in minutes
  • Available in anodised Black OR Red
  • Unlike other valves on the market, ours produces no check engine lights (EML)
  • Covered by the unique Forge Lifetime Warranty*

Our uprated valve for the Hyundai i20N and the Elantra N Line has been expertly manufactured and designed in the UK, meaning we can provide the industry leading valve for your vehicle. Specifically designed for the Hyundai, this valve can be used either as a fully atmospheric (blow off) valve, or a recirculating valve - you choose!

Our unrivalled design uses a boost to side entry on the valve meaning unlike our competitors the valve cannot lift under high or low boost applications. The advantage of this eliminates the need to change the valves internal spring rate to a higher tension when tuning the vehicle. This valve is finished in anodised black or anodised red to not only give this product the wow factor out of the box, but also to improve the aesthetics of the engine bay of your vehicle.

We recommend servicing your valve every 3 years, or 20,000 miles, whichever comes sooner





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

from on Apr 10th 2024 Verified Purchase
Just received the valve and some hours later I started assembling it. The installation was easy and really cool result. I personally chose atmospheric mode and no performance lost. If you already have the intake mod, this is a next step to get even more air sound :)
from on Dec 2nd 2023 Verified Purchase
Fitted today, fairly easy install the only issues i ran into were getting hoses off, car is only a month old so maybe thats why they were hard and also trying to get the factory hose clap over the dump valve inlet fitting with the new vac hose was a pain as it seemed to be the same diameter as the gap and required some lube to slip it over enough.
Otherwise a very easy and happy install at the same time as the turbo inlet which actually meant i used some red electrical tape to cover the supplied black rubber bung to make it match the red turbo inlet i bought (review over there too)

One thing to mention that in N mode theres lots of noise but in normal its less so and just revving its barely noticeable which is a nice discovery as it means for normal driving it can be quieter
from on Oct 23rd 2023 Verified Purchase
Awesome little product, took my about an hour to install as some of the OEM bolts were very tight but once the old kit is out it took about 10 mins to get the dv in!

No noticeable performance drop and its actually very loud.
from on May 10th 2023 Verified Purchase
Installing this dumb valve was extremely easy and took less than 30 mins to install, I have run this dump valve in both vent and recirculation modes by re attaching the pipe to the intake, and had noticed no loss in performance when installed in the vent mode, Sounds amazing and was a lot louder than I was originally expecting!
Another 10 star product from forge.

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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.



Hyundai i20N Atmospheric and Recirculating Dump Valve




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

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Submitted questions may be published on the website.

Can it be adjusted?

Only by way of changing the spring to hold higher pressure in mapped engines.

Is it okay to drive on rainy days?

Yes there is no problem with water ingress with this product.

Hello, I purschased the item but I was wondering if I need to torque the nuts? I used the factory nuts.


You need to fit the supplied fasteners not the OE nuts and just make sure its tight.

Dear all, Do you have any idea if this dump valve will fit a regular BC3 i20 N Line? This is the 3 cilinder 1.0 liter version of the car (non-hybrid). Or would it be better to use the dump valve intended for the 1.4 tgdi i30? Thanks in advance.


We are developing a new product for this engine, It will be avalible later this year, this product is not compatible.

Good morning I have a question I hope you will answer me, I bought the Forge dump valve and I installed it in external discharge, if I put it in internal discharge, there is no risk for the turbo and is it better for the engine? Thank you for your reply.

Hello , there is no risk to the turbo if this is set up the dump atmospherically.