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Mountune m520 MRX Package Levels Up the Ford Focus RS To 500-plus HP

The 2.3-liter EcoBoost in the Focus RS continues to be more powerful than the four-cylinder turbo in the Mustang EcoBoost High Performance Package. But with a bit of know-how from Mountune, £5,974.99 unlocks no fewer than 520 PS and 700 Nm of torque.
Mountune m520 MRX Upgrade Levels Up the Ford Focus RS To 500-plus HP 10 photos
Photo: Mountune
Mountune m520 MRX Upgrade Levels Up the Ford Focus RS To 500-plus HPMountune m520 MRX Upgrade Levels Up the Ford Focus RS To 500-plus HPMountune m520 MRX Upgrade Levels Up the Ford Focus RS To 500-plus HPMountune m520 MRX Upgrade Levels Up the Ford Focus RS To 500-plus HPMountune m520 MRX Upgrade Levels Up the Ford Focus RS To 500-plus HPMountune m520 MRX Upgrade Levels Up the Ford Focus RS To 500-plus HPMountune m520 MRX Upgrade Levels Up the Ford Focus RS To 500-plus HPMountune m520 MRX Upgrade Levels Up the Ford Focus RS To 500-plus HPMountune m520 MRX Upgrade Levels Up the Ford Focus RS To 500-plus HP
If you were wondering, that’s 513 horsepower and 516 pound-feet. The m520 MRX is the next step up from the m450 MRX, swapping the standard turbocharger for a water-cooled BorgWarner with dual row ceramic ball bearings, a high-flow catalytic converter, V-band downpipe, stainless-steel hose clamps, silicone joiners, and plenty more.

The hardware list further includes performance camshafts and valve train, as well as the XtremeDi fuel pump. As expected, Mountune recommends m520 MRX customers to equip the car with the mTune handset, upgraded intercooler, intake, 3.0-inch exhaust pipes, and forged engine internals to eliminate the possibility of a blown 2.3-liter EcoBoost.

In the company’s own words, “the m450 offering incredible drivability with a wide torque spread and a peak power output of 450 PS (444 horsepower), or for those wanting the ultimate in performance, m520 delivers incredible top-end performance.” Customers interested in the lesser of the two tuning packages can expect to spend £2,950.

Now that the Mk4 Focus is available in vanilla configurations and as the ST with either the EcoBoost or EcoBlue, 2020 will bring forth the RS with close to 400 horsepower. Ford of Europe is expected to take on Mercedes-AMG with this car, which is why the 2.3-liter turbo is rumored with 48-volt assistance for superior performance and efficiency.

The Blue Oval has already electrified the 1.0-liter EcoBoost in the Puma crossover, and sooner rather than later, the entire European lineup will adopt mild-hybrid tech to meet the CO2 fleet average of 2021. To the point, Ford needs 95 grams per kilometer on average, a tough task if you remember the Mk3 Focus RS emits 175 grams per kilometer.

Turning our attention back to Mountune, the Ford specialist from Hutton in Essex states clearly that either upgrade will void the automaker’s warranty. In other words, tread at your own risk.

[YOUTUBE= https://youtu.be/0se6ZH_HH5s]
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About the author: Mircea Panait
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After a 1:43 scale model of a Ferrari 250 GTO sparked Mircea's interest for cars when he was a kid, an early internship at Top Gear sealed his career path. He's most interested in muscle cars and American trucks, but he takes a passing interest in quirky kei cars as well.
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