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Downpipe / Sports Cat [Mk4 Focus ST] - Fully Fitted

The mountune Downpipe / Sports Cat has been engineered for the Mk4 Focus ST to reduce exhaust back-pressure at the turbocharger, allowing faster response and additional power. The 3" pipe includes a large diameter 5” motorsport-type, 200 cell count metal substrate honeycomb catalyst, to ensure effective, ultra high flow performance in extreme environments.

Revised engine calibration will be required for optimal performance and may emit the EML without it (our m365 calibration will support this).

We recommend this product is fitted with mountune GPF-back exhaust.

This product includes a fixed labour charge for installation at mountune HQ in Hutton, Essex. This is a comprehensive drive in, drive out service, where you can make use of our comfortable and spacious customer waiting area while the work is being carried out.

Fitting time: 1 hr

For full product information, click here.

Please note: the price shown for this product includes installation at mountune HQ only, and is not transferrable to any other dealer or installer.

Please specify your preferred installation date in the 'notes' section when checking-out; our workshop team will then contact you to confirm this date. If we can't accommodate your preferred choice, the team will discuss other available dates.




    Yes, our 'hub' boasts a comfortable waiting area with ample seating and workspace, free Wi-Fi, complimentary coffee and snacks, plus it features a large selection of our products and engines on display, too.

    With over 40-years of designing, producing and fitting ECU/TCU software, components and engines, there is no better choice than mountune to have your performance parts fitted. Just like you, we're all petrolheads and treat your pride and joy with the care and attention that it deserves (as if it were our own car), so you can have complete peace of mind of not only the highest levels of workmanship, but that the people that designed the hardware or software are also installing it as originally intended.

    You'll also be able to collect and spend mountune reward points too, helping you save money.

    For all of our garage services our labour rate is currently £90 per hour (£75 +VAT).

    Yes, when you choose mountune to install your performance parts and ECU/TCU tuning, not only can you spend any mountune reward points you've collected (in the usual way), you'll also earn mountune rewards too. So you can save more and spend less, regardless of how you shop with us.

    Yes, we offer a comprehensive service for your Ford or VAG model using manufacturer approved or supplied parts, in accordance with our extensive schedule. Please see our separate servicing products, which can be added to your basket and booked individually, or together with performance upgrades.

    It's also the only place you'll get a 'mountune' stamp in your book!

    If you have other hardware you'd like installed together with your mountune upgrades please let one of our workshop team know and we'll do our best to accommodate you.

    Our workshop currently operates Monday - Friday, 8.00am - 5.00pm. If you have any special requirements around dropping off or picking up your vehicle, please just let us know and we'll do our best to accommodate you.

    Yes, whilst booking an upgrade or service online is the best way to secure products and services in our workshop, you'll normally be able to add additional performance parts on the day as well, should you wish.

    Customer Reviews
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    Filter Reviews:
      Philip P.
      United Kingdom United Kingdom

      M365 package

      I recently upgraded my brand new focus ST track pack to full m365 spec inc carbon air box+pipe and full turbo back system. I have to say the quality and fit of parts is excellent and the performance is superb it has transformed the car. Very happy

      Matt G.
      United Kingdom United Kingdom

      Sports cat downpipe.

      Great quality, very good service from the team. The higher flow downpipe makes a big difference with how quickly the engine accelerates, especially above 5000 rpm where I feel the stock setup is disappointing. I also think this part is great value in comparison to some of the other brands, I can highly recommend having this fitted at Mountune if you have the opportunity.

      Seb M.
      United Kingdom United Kingdom

      I couldn’t praise mountune enough!

      I couldn’t praise mountune enough! I’ve had a lot of work done by mountune on my mk4 focus ST, full exhaust system, carbon fibre induction kit with carbon fibre rear induction intake, secondary alloy intercooler, mountune 365 flash drive, short shifter arm and many more bits! Ryan who I dealt with for the whole process was extremely helpful and extremely knowledgeable on the mountune products. He helped with the set up of the flash drive and any additional queries I had on the install. The car goes like a rocket now! The products are built to the highest quality and you can tell from the moment you open the box. Couldn’t be happier. Thanks again to the Mountune team!