Currently reading: Mountune Ford Focus RS pack takes hot hatch to 513bhp
New M520 MRX upgrade pack dramatically ups performance for less than £6000, arriving alongside cheaper 444bhp option

Mountune has taken the Ford Focus RS to a whole new performance level with two new packages - the more powerful of them boosting the hot hatchback’s output to 513bhp. 

The new packages sit at the pinnacle of the long-established Ford tuner’s line-up for the Focus RS, with an extensive list of modifications including the removal of the 2.3-litre Ecoboost unit’s existing turbocharger in favour of “specifically engineered” BorgWarner items. 

In the lesser-powered ‘M450’ package - priced from £2950  - the new turbocharger allows an increase of 49bhp over the previous M400 package - up to 444bhp, with 428lb ft of torque. Both figures are considerably more than the recently released (and much more expensive) Mercedes-AMG A45.

As well as the new turbo, Mountune introduces a high-flow sports catalytic converter and exhaust downpipe alongside other ancillary upgrades to be fitted at Mountune’s Brentwood HQ, or available to order online soon.

But that’s just the start; the M520 package uses a more advanced BorgWarner ‘EFR 7163’ turbocharger, alongside an uprated fuel pump, camshafts and valve train. A recalibrated ECU allows this package to take the 2.3-litre engine to 513bhp and 516lb ft. 

That kit commands a minimum £5975 price tag and requires substantial internal engine modifications that are said to achieve the output levels “safely and reliably”, but will invalidate the existing warranty of the car, unlike some Mountune upgrade packs. 

Mountune doesn’t quote performance times for either pack, but given the latter puts out around 100bhp more than the fastest standard production hot hatchback, we can expect a 0-62mph time of well under four seconds. 

Read more: 

New Ford Focus RS Mountune kits add power and tech 

2020 Ford Focus RS to have 400bhp hybrid powertrain

Mountune launches new brand for VW Group upgrades


Read our review

Car review

Is Ford’s AWD mega-hatch as special as we first thought? And can the Focus RS beat stiff competition from the Volkswagen Golf R and Mercedes-AMG A45?

Join the debate

Add a comment…
MisterMR44 20 August 2019

That's a grenade with the pin under the throttle pedal...

It's back to the good old days when an engine in a Ford got to 50k miles and then sounded like a drumkit being thrown down the stairs before finally peeing oil out the bottom and stopping.

Peter Cavellini 19 August 2019

How about this.....

 Next RS to be an EV.......?, shocked?, relax, it’ll never happen, will it?

Tuatara 20 August 2019

next rs

Peter Cavellini wrote:

 Next RS to be an EV.......?, shocked?, relax, it’ll never happen, will it?

it is way off yonder, so maybe ford will have the tech sorted by then

JMax18 19 August 2019

What a beast. Love the Focus

What a beast. Love the Focus RS but it needs an update.

This is exactly what sets Ford apart from Vauxhall; a fun, cool, crazy side. Glad to hear of the resurrection of VXR, hopefully we'll see some great stuff out of them soon.