Maxton Design Rear Diffuser & Milltek GPF/OPF-Back Exhaust System Ford Fiesta MK8 8.5 ST 18-22
£1,429.00 – £1,729.00Price range: £1,429.00 through £1,729.00
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Applies to all in-stock items only.
why buy from us
- 14 Day Return Period
- Authorised Dealer
- Free UK Delivery over £100
- Expert Advice 24/7
Description
REAR DIFFUSER + MILLTEK GPF/OPF BACK EXHAUST SYSTEM – FORD FIESTA MK8 ST & MK8.5 ST (2018-2022)
FITS ONLY:
FORD FIESTA MK8 ST pre Aug 2020
FORD FIESTA MK8 ST post Aug 2020
FORD FIESTA MK8.5 ST
COMPLETE SET CONTAINS:
– Rear diffuser
– Milltek GPF/OPF back exhaust system
MILLTEK DESCRIPTION:
Every Milltek system is designed, developed and hand-finished here in the UK by time-served craftsmen, each one produced in aerospace grade type 304, non-magnetic stainless steel. This superior material is less susceptible to discolouration, lasts almost indefinitely and is used throughout the entire construction of our pipework, silencers and associated hardware.
Mandrel bending ensures constant radius bends for optimised gas flow, and bore diameters are carefully enlarged over stock to ensure ultimate performance without the loss of mid-range torque. All of the Milltek exhaust systems endure a comprehensive acoustic development process to deliver a tone that is sporty and crisp, without ever inducing NVH, drone or cabin resonance.
We always recommend the exhaust is fitted by a competent garage or tuning workshop so normally avoid issuing install guides.
There is a generic one on their website here – MILLTEK INSTALLATION GUIDE
MILLTEK EU TYPE-APPROVAL CERTIFICATE
The systems are 2.76 inch (70mm tube) and there are downpipes available to remove the OPF with and without Hi Flow Sports Cats.The pre sept systems require re-use of the OEM Valve actuator, however the post sept models changed, and we therefore now supply the correct actuator to work with the same system.There is also an Active Valve Control available for these models to give the user complete control over the valve positions at different drive modes / ranges.The OPF-Back System is EC Approved.
REAR DIFFUSER DESCRIPTION:
** This product is a replacement for original diffuser **
CHARACTERISTICS OF REAR DIFFUSER:
– Adds aesthetic value.
– Lightweight and offers some flexibility.
– This product is made from ABS plastic. The same material is used widely in the automotive industry.
MORE INFORMATION ABOUT REAR DIFFUSER:
– No additional work is required to finish the product.
– The product will arrive with a protective film.
– Removal of the protective film will void any returns, only remove once you are certain the product will fit.
– We cannot be held responsible for the incorrect installation or use of this product.
– Please compare the vehicle in the listing photos and title to your own, to ensure correct fitment.
– We advise trusting installation to a qualified professional unless you are confident following the provided fitting manual.
– This product has been TUV MATERIALGUTACHTEN certified.
– The removal of the holographic verification sticker will void a return, this identifies the item as an official and authentic Maxton Design product, removal is at buyer’s risk.
Product is made of ABS plastic.
Available in three surface look options: textured, gloss black, carbon look.
This product has been TUV MATERIALGUTACHTEN certified (TUV certify for material).
RETURNS & Warranty
Returns Policy
We want you to shop with confidence at Sansoms Specialist Parts. If you are not completely satisfied with your purchase, you may return eligible items in accordance with the policy below.
Returns must be requested within 14 days of delivery
Items must be unused, uninstalled, and in original packaging
Products must be returned in a resaleable condition
Proof of purchase is required
Custom-made, special-order, or clearance items may be non-returnable unless faulty.
How to Request a Return
Please contact our support team before returning any item. Returns sent without prior authorisation may be refused.
Email: support@sansomsspecialistparts.co.uk
Include your order number and reason for return.
Refunds
Once your return has been received and inspected, we will notify you of the outcome. Approved refunds will be processed to the original payment method within 5–10 working days.
Original shipping costs are non-refundable unless the item is faulty or incorrect.
Warranty Information
All products sold by Sansoms Specialist Parts are covered by a manufacturer’s warranty, where applicable.
Warranty coverage typically includes:
Manufacturing defects
Faults occurring under normal use
Warranty does not cover:
Incorrect installation
Wear and tear
Damage caused by misuse or modification
Track or competition use unless stated otherwise
Warranty Claims
To make a warranty claim, please contact us with:
Order number
Description of the issue
Supporting photos or videos
Claims are subject to inspection and manufacturer approval.
Important Notes
Professional installation is strongly recommended
Warranty may be void if parts are incorrectly fitted
Vehicle compatibility is the customer’s responsibility
Need Help?
If you have any questions regarding returns or warranty, our team is happy to assist.
Delivery & Stock
Delivery Options
We aim to get your performance parts to you as quickly and safely as possible.
Standard UK Delivery: 3–5 working days
Express UK Delivery: 1–2 working days (subject to availability)
International Delivery: 5–10 working days (depending on location)
All orders are carefully packaged to ensure your parts arrive in perfect condition.
Shipping Costs
Standard delivery is charged at checkout based on weight and destination
Free UK delivery on orders over £100
We offer tracked shipping so you can monitor your order every step of the way.
Stock Availability
Most parts are held in stock for immediate dispatch
Some specialist or custom parts may have longer lead times
Stock levels are updated regularly, but occasionally items may be temporarily unavailable
If a product is out of stock, we will notify you immediately and offer alternatives or an estimated delivery date.
Order Processing
Orders are typically processed within 1–2 working days
You will receive a confirmation email once your order has been dispatched
Large or heavy items may require additional handling time
Important Notes
Performance parts may require professional installation
Delivery times are estimates and may vary during peak periods
International shipments may be subject to customs or import fees





