Company: Forge Motorsport

Ford Fiesta ST MK8/Ford Puma ST Induction Kit

Product code: FMINDK38
£194.66 Inc. VAT £162.22 Exc. VAT (VAT will be added during the checkout process) Estimate Delivery

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Product Description

The FMINDK38 is the cold air induction system for Ford’s latest generation 1.5-liter 3-cylinder ST engine. Like with all manufacturers in recent times the need to make smaller engines more efficient and more powerful has been an engineer’s top priority, this then creates a problem for the aftermarket manufacturers to improve what is already fitted to the vehicle, nevertheless this hasn’t stopped us at Forge Motorsport.

A large amount of knowledge and knowhow from past development with all Ford models was available to us, however this is a totally new power unit and we needed to spend an extensive amount of testing time to ensure we ended up with a product that gives genuine improvements over the standard air box.   

The choice of filter was decided after weeks of real-world testing and hours on the dyno experimenting with different filter options. We found that our Forge pleated filter worked best with an increase in power and torque while maintaining the best filtration properties, the build quality of the filter is superb and carries a limited lifetime warranty. This performance filter has been designed with a high quality silicone coupling and W2 Stainless Steel hose clamps to join the anodized black machined billet velocity stack. The filter is made using a high quality, high flow, synthetic nanofiber filtration media which is pleated to maximise surface area and in turn increase air flow. You can find a replacement filter for this kit here.

The use of the velocity stack MAF sensor housing maximises as much smooth air flow as possible. Our skilled CAD engineers have simulated different MAF sensor housing models to create the best design for this kit. The illustrations below demonstrate the benefit of using velocity stack science and show the smoothed air flow into the MAF sensor housing and inlet tract from the air filter.

With the combination of both the filter and MAF sensor housing we saw total gains of 4bhp however this only tells half the story, if you study the data from the dyno graph you can see the increase in torque from 1500-3000 RPM and again at 4500 until the red line, in fact at 2200 RPM gains of 20NM are achieved. This is also the same with the BHP power figures, you are seeing gains sooner and at the latter stages of the rev range, making the engine perform stronger when you need it to.  On a tuned vehicle this combination is an essential purchase as the OEM air box is found to be too restrictive to achieve the optimum power figures and smooth power delivery.

As a bi-product from FMINDK38 the acoustics from the 1.5 engine have been improved, there is now a purposeful induction roar under hard acceleration and a very addictive turbo flutter when you lift off the throttle. Not only to improve the aesthetics but to aid as a heat defence from the hot engine, we have provided a laser cut and powder coated aluminium shield, this surrounds the filter and incorporates the OEM air ducting to direct cold air to the intake.

This kit can be installed to the OEM intake pipe or can be paired with our own silicone intake pipe FMINLH21, the key here is to further smooth the airflow to the turbo and eliminate any metal pipework as this is susceptible to greater heat soak and a potential loss in power.  

A commonly asked question is will this fit any other aftermarket or the inlet hose intake? The answer is yes it will fit other manufacturers inlet hoses and fits to the original Ford inlet hose. 

  • MAF Boss Manufactured from 6082 aerospace grade aluminium.
  • Black anodised & powder coating for ultimate protection and durability.  
  • Forge Pleated performance air filter which has been designed with a high quality, high flow, synthetic nanofiber filtration media which is pleated to maximise surface area and in turn increase air flow.
  • No engine management lights (EML)
  • Increased air flow  
  • Limited Lifetime warranty


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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 22nd 2023 Verified Purchase
Great product, easy to install and looks and sounds wicked! Much better than the previous induction kit I had installed!

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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.



Ford Fiesta ST MK8/Ford Puma ST Induction Kit






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.

Will this fit a 2021 ST-Line 1.0L Puma?


No this product is not compatible with the 1.0 eco boost equipped vehicles.

Can this be used on mk7 or is there mk7 version

No, the FMINDK38 is not compatible with the ST180 Ford Fiesta MK7, we offer the part number FMINDST180 for the ST180 Ford Fiesta MK7.

Hi, I’m looking at purchasing this induction kit for my daughter’s mk8 fiesta st. Is this ok to do without any mapping or extra parts like a induction hose etc


Our development vehicle had had this product fitted to it for 1.5 years without any issue and this is a vehicle with out ECU modifications.

So, yes it will be perfectly fine, as our any of the products we offer for this vehicle.