The Ford Focus ST stands as a benchmark in the hot hatch segment, blending sharp handling, practical space, and potent performance. When paired with Mountune’s aftermarket upgrades, it elevates to new heights, offering enthusiasts a cost-effective path to supercar-like thrills without sacrificing daily drivability. This review delves into the m330 kit’s impact, examining engine enhancements, on-road behavior, and long-term appeal.
Engine and Performance Enhancements
Mountune’s m330 upgrade targets the Focus ST’s 2.3-liter turbocharged four-cylinder engine, originally producing 276bhp and 420Nm of torque. The plug-and-play ECU remap pushes output to 326bhp and a substantial 515Nm, a gain of 50bhp and 95Nm respectively. This simple modification shaves the 0-62mph sprint to 5.2 seconds, making it quicker than many rivals in its class.
Beyond raw figures, the upgrade broadens the powerband. Torque peaks early and sustains through the rev range, enabling effortless acceleration in higher gears without constant downshifts. Peak power arrives around 5,500rpm, with the engine pulling strongly to the 7,000rpm redline. Launch control receives recalibration for sharper response, ideal for track days or spirited runs.
| Specification | Standard ST | Mountune m330 |
|---|---|---|
| Power | 276bhp | 326bhp |
| Torque | 420Nm | 515Nm |
| 0-62mph | 5.7s | 5.2s |
| Top Speed | 155mph | 155mph+ |
| Price (Kit) | N/A | £589 |
The six-speed manual transmission pairs seamlessly with the boosted engine, its precise shifts enhanced by rev-matching in Sport mode. Front-wheel drive manages the surge admirably, though torque steer becomes noticeable under hard acceleration.
Driving Dynamics and Modes
On twisty B-roads, the upgraded ST shines. The chassis retains its poise, with precise steering and composed suspension soaking up imperfections while delivering flat cornering. Extra power amplifies mid-range punch, allowing drivers to exploit the grip from Michelin Pilot Sport tires without drama.
- Normal Mode: Balances comfort and efficiency, suitable for commuting with subdued engine note.
- Sport Mode: Sharpens throttle response, firms up steering, and amplifies exhaust pops and bangs for auditory excitement.
- Track Mode: Maximizes performance with the most aggressive mapping, ideal for circuits.
Refinement impresses too. Wind and tire noise remain controlled at motorway speeds, and fuel economy hovers around 30mpg in mixed driving, defying the hot hatch stereotype. The 375-liter boot and spacious cabin ensure practicality for families or weekend trips.
Design and Interior Practicality
Externally, the Mountune kit maintains the ST’s aggressive stance with subtle badging denoting the upgrade. Optional Mountune styling packs add spoilers and alloys for personalization. Inside, Recaro sports seats hug occupants firmly, complemented by a driver-focused cockpit with digital displays and intuitive controls.
Build quality rivals premium rivals, with supportive front seats and ample rear space for adults. Infotainment includes Ford’s SYNC 3 system, supporting Apple CarPlay and Android Auto for seamless connectivity.
Advanced Mountune Options: m365 Explored
For those seeking more, Mountune’s m365 kit builds on the m330, targeting 365bhp while broadening torque delivery across gears. Compatible with both manual and automatic STs, it appeals globally, from Australia to Europe. This evolution removes turbo lag, providing instant response from low revs, perfect for overtaking or autobahn blasts where top speeds exceed 155mph.
Testing confirms the m365’s broad powerband eliminates gear-hunting needs, maintaining momentum effortlessly. Daily usability persists, with Normal mode taming the beast for urban duties.
Cost, Warranty, and Ownership Considerations
At £589, the m330 represents exceptional value, installable in under an hour without tools. However, it voids Ford’s warranty, a trade-off for buyers prioritizing performance over coverage. Resale value holds strong among enthusiasts, and Mountune’s reputation ensures reliability.
Running costs stay reasonable: insurance groups align with standard ST, and maintenance follows Ford schedules. Premium fuel is recommended to unlock full potential.
Competitor Comparison
The Mountune ST undercuts pricier alternatives like the Honda Civic Type R or Volkswagen Golf R on modification cost while matching their pace.
| Model | Power | 0-62mph | Price (Base) |
|---|---|---|---|
| Mountune Focus ST | 326bhp | 5.2s | £31,164 + £589 |
| Honda Civic Type R | 316bhp | 5.8s | £38,000 |
| VW Golf R | 316bhp | 4.7s | £42,000 |
| Focus RS (Discontinued) | 350bhp | 4.7s | N/A |
It revives the RS spirit affordably, blending usability with extreme fun.
Real-World Testing Insights
Autobahn runs highlight the upgrade’s high-speed stability, with the engine’s broad torque enabling relaxed cruising or full-throttle surges. Track sessions reveal chassis limits before mechanical ones, praising the balanced setup.
Frequently Asked Questions
Does the Mountune kit fit automatic Focus STs?
Early m330 kits targeted manuals, but newer versions like m365 support automatics, expanding accessibility.
Will the upgrade affect fuel economy?
No significant drop; 30mpg+ is achievable in gentle driving, matching stock figures.
Is professional installation required?
It’s plug-and-play, but Mountune recommends authorized fitters for optimal results.
How reliable is the boosted engine?
Mountune’s conservative tuning preserves longevity, with many cars exceeding 100,000 miles.
Can I revert to stock for warranty claims?
The ECU remap is reversible, but check with Ford as traces may remain.
Final Performance Verdict
The Mountune-upgraded Ford Focus ST redefines hot hatch value, injecting RS-level excitement into an already capable platform. Whether m330 or m365, these kits deliver transformative power affordably, rewarding skilled drivers with grin-inducing dynamics. Ideal for enthusiasts tired of standard thrills.
References
- Ford Focus ST Mountune m365 review: the RS we never got? — Top Gear. 2022. https://www.topgear.com/car-reviews/ford/mountune-m365-2022/first-drive
- Ford Focus ST Mountune m330 review — Auto Express. 2020-08-28. https://www.autoexpress.co.uk/ford/focus/92652/ford-focus-st-mountune-review
- Ford Focus ST Mountune and Focus RS — Evo. N/A. https://www.evo.co.uk/ford/focus-rs/10480/ford-focus-st-mountune-and-focus-rs

