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Cat Back Exhaust [Mk3 Focus ST] - Fully Fitted

The mountune Cat Back Exhaust for Mk3 Focus ST is manufactured from 2.5” diameter, AISI 304 stainless steel (EN58E) mandrel-bent tubing with lazer cut flanges. All muffler assemblies are robotically TIG welded AISI 304 stainless steel for long life under extreme performance and feature consistent internal diameter throughout the entire length of the assembly.

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 30 mins

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
    5.0 Based on 6 Reviews
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    Filter Reviews:
      David B.
      United Kingdom United Kingdom

      My day at mountune

      Well, Ryan is a gent, puts you at ease, very helpful and could nt do enough for you. Very professional outfit as well.

      Darren S.
      United Kingdom United Kingdom

      Mountune Cat Back Exhaust System

      Very pleased with the Mountune Exhaust. Didn't want something too loud or annoying. This is perfect for me and just makes the sound a bit deeper and looks better from behind.

      Adam S.
      United Kingdom United Kingdom

      Great product and service

      Had this fitted at Mountune the other week and was really pleased with the customer service there. The exhaust looks great and sounds like the car should have done from the factory. Doesn't drone at idle or during motorway driving but has a nice sound when you put your foot down a bit. Exactly what I was after.

      mountune Cat Back Exhaust [Mk3 Focus ST] - Fully Fitted Reviewmountune Cat Back Exhaust [Mk3 Focus ST] - Fully Fitted Review