Company: Forge Motorsport

Atmospheric and Recirculating Valve for Hyundai i30N, Kona N, and Veloster N

Product code: FMDV20
£200.50 Inc. VAT £167.08 Exc. VAT (VAT will be added during the checkout process) Estimate Delivery

Please select options and qty below:

Check your vehicle compatibility


More info A replacement oil cap for multiple applications. - Read More
More info Hyundai I30N Brake Lines - 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 has been developed in conjunction with our work on the BTCC championship winning Hyundai i30N's - read more here

Our uprated valve for the Hyundai i30N, Kona N, and Veloster N 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 part replaces OEM Part No. 282342-CTA4


  • 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
  • Unlike other valves on the market, ours produces no check engine lights (EML)
  • Covered by the unique Forge Lifetime Warranty*

This kit will include all the parts required for atmospheric or recirculating set up. 


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 Mar 27th 2024 Verified Purchase
from on Mar 27th 2024 Verified Purchase
Very nice piece of engineering from Forge, makes a fantastic noise too!
from on Mar 17th 2024 Verified Purchase
Cracking valve from Forge, nice bit of kit that adds to the sound of the turbo!
from on Mar 7th 2024 Verified Purchase
Great product supper fast delivery and easy to fit.
from on Oct 18th 2023 Verified Purchase
Good quality, fast delivery and big smiles
from on Aug 24th 2023 Verified Purchase
Excellent Product, fairly easy to fit and sounds Amazing! Big Thanks to Forge and personally Paul 👌🏻
from on May 11th 2023 Verified Purchase
Great products and fast delivery
from on Apr 7th 2023 Verified Purchase
Replaced the oem valve with the Forge item on my kona n. Item was out of stock when ordered but was kept informed of developments during the intervening weeks. Nice quality product but a real pain to remove the oem item and fit the Forge bov due to location of bolts and the body design of bov. Might be easier if accessed from under the car but from the top expect some skinned knuckles!
from on Mar 3rd 2021 Verified Purchase
Fantastic product. It's like having an angry Librarian under the bonnet violently shushing you every time you apply boost. Highly recommended. :D
from on Mar 1st 2020 Verified Purchase
from on Feb 24th 2020 Verified Purchase
Excellent quality product, easy fit and the main thing is a very prompt fast delivery 👍🏻 Thanks Forgemotorsport made the Nperformance bit bigger beast 👌🏻 Very helpful staff (Jamie)
from on Jun 23rd 2019 Verified Purchase
Good products and fast delivery.

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.



Atmospheric and Recirculating Valve for Hyundai i30N, Kona N, and Veloster N


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.

Hallo, ich habe einen Facelift DCT und auf 390 HP aber ich habe das Problem manchmal wann ich Vollgas etwas zurücknehme und zugleich schalte das der Motor in so eine art Loch fällt und das Blow off komische Geräusche macht und das Auto nicht mehr beschleunigt, auch nicht wann ich Vollgas gebe !! Ich muss das Gas kurz wegnehmen und und wieder drauf dann passt es wieder. Bitte um Antwort. Mfg Leopold Lumpi

Hallo, das Ventil wird über ein Magnetventil betätigt. Ich vermute, dass dies möglicherweise das Problem ist. Das Schmiedeventil sollte keine negativen Auswirkungen auf die Leistung des Fahrzeugs haben


Do you need to remap your car or can you swap this straight for the oem one, snapped a small plastic bit of so need to replace the BOV just wondering if it requires a tune aswell


No, this product works fine with standard and modified vehicle software.

Buongiorno vorrei sapere se si può usare la stessa valvola sia per il modello 2018 250cv che per l'ultima versione 280cv, ho tenuto la vecchia valvola della macchina che avevo prima e vorrei montarla sulla nuova, grazie


Yes this will fit all I30N models pre face lift and face lift.


Sì, si adatta a tutti i modelli I30N prima del lifting facciale e del lifting.

If u brought this for my kona n would I need the long thiner pipe on the induction kit? Only asking as I brought the induction kit and looks like there's a bung for a pipe end

Hello , the valve can be used in conjunction with the OEM intake and plumbed to either recirc or atmospheric , if using the intake FMINDK28 the valve can also be fitted in either recirc or atmo, the supplied FMINDK28 comes with all the relevant hardware to fit to either the the forge valve or the oem valve. 

have you a suitable blow off valve for a Kona Nline 1.0L 2023

Hello , currently we do not however this is a product we may develop in 2024 

Elantra N Is it compatible?


Yes this product is compatible with your vehicle.

Hi what spring do these come with as standard and if remapped what spring would u suggest is used thanks


Thank you for your question. 

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.

Hope this helps.

What are the dimensions for the silicone vacuum tubing/ do you supply it by itself?

Internal vacuum tube diameter is 4mm 

you can order here

I have a kona n. Oem configuration is recirculating. Will atmospheric configuration result in any running issues or alarms?

This valve is designed to function perfectly as recirculation or fully vented / atmospheric, we have sold  many of these valves with no issues, this valve also comes with a  lifetime warranty to give you complete piece of mind.

Does this work with the forge induction kit for the i30n

Hello. Yes, this will work with the induction kit for the i30N installed  

Hi guys Silly question what's the easiest way to change the bov from recirc to atmospheric adapter. I'm trying and it's quite difficult to open

Thank you for your enquiry Reevunden.

If you are struggling to remove the BOV trumpet, I would suggest using either a thin plastic trim tool or a small screw driver and place it through the slots to help leaver the BOV trumpet anti clockwise. If you are using any metal tools wrap them with tape to prevent any bruising to the valve.

Hope this helps