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Forged Engine Rebuild [Mk3 Focus RS] - Fully Fitted

The mountune Forged Engine Upgrade for the 2.3-litre EcoBoost engine native to the Mk3 Focus RS, includes pistons which are manufactured exclusively for mountune in the US by MAHLE Motorsport, and connecting rods made in the USA by Carrillo to our specification.

In addition to the uprated rods and pistons, this upgrade replaces or upgrades a number of other key engine components to maximise reliability, including:

  • Cylinder head gasket (latest specification)
  • Big end bearing shells (heat treated)
  • High Tensile Head stud/nut set (replacing OE head bolt set-up)
  • Oil control system (baffled sump - including OE balance shaft delete)
  • All required gaskets / seals
  • Timing chain tensioner
  • Engine oil & filter (engine oil changed to 10W/60 specification)
  • Coolant change
  • Engine plaque
  • Air-con re-gas
  • mountune steel conrods
  • mountune forged pistons

Included with this price is a 500 mile post run-in period engine diagnostic check, with a complimentary oil and filter change.

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.

We will need your car for up to 8 working days.

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.

PLEASE NOTE: Your engine will be subject to a visual inspection after removal from the vehicle. There will be a secondary inspection after tear down. Any additional required work will be advised and quoted.


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.

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Filter Reviews:
    Mark S.
    United Kingdom United Kingdom

    Over 35 years of excellence

    Such a great experience and Ryan was amazing in keeping me updated on every aspect of the build, I can not recommend mountune HQ enough everyone will bend over backwards to make sure you get the highest quality of service, if ur wanting to get ur forged engine rebuild done and are not sure! Rest assured the people at mountune HQ will look after ur pride and joy.

    mountune Forged Engine Rebuild [Mk3 Focus RS] - Fully Fitted Review
    United Kingdom United Kingdom

    Brilliant service

    Excellent service by Ryan and the team Car finally 400x with forged engine Sounds amazing, with exhaust High quality work carried out and can’t Wait for the summer + nice weather again And see you after 500 miles Thanks mountune

    mountune Forged Engine Rebuild [Mk3 Focus RS] - Fully Fitted Reviewmountune Forged Engine Rebuild [Mk3 Focus RS] - Fully Fitted Review