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m520 MRX Power Upgrade Kit [Mk3 Focus RS]

Choose a mTune handset
The mountune m520 MRX upgrade replaces the OE turbocharger with a Borg Warner series larger frame unit to deliver incredible power output with minimal increase in turbocharger lag, greatly enhancing the driving experience.

Tested and validated over thousands of miles and countless hours on the dyno for durability and performance, the mountunem520 MRX turbocharger upgrade includes all required hardware, fittings and hoses needed for installation and is the perfect upgrade for customers already running either m400R or m400X.

Unlike other bolt on upgrades that deliver just peak or high RPM power, the m520 upgrade offers performance throughout the entire power band ensuring a very responsive and drivable car. The m520 MRX Turbocharger Upgrade is designed for those that are looking for well balanced yet extremely powerful performance derived from years of developing race-winning Ford 4-cylinder turbocharged engines. 

Engineered around the BorgWarner EFR turbocharger platform for seamless integration and excellent response and performance, the mountune m520 MRX upgrade has been developed as a complete system with everything available from one source, ensuring the performance and quality you’ve come to expect from mountune.

Because of the unique Low Inertia Gamma-Ti Turbine Wheel, power comes on strong with amazing response and virtually no turbo lag whilst utilising the integrated recirculation valve ensures smooth drivability and throttle transition. 

Turbocharger Features
  • Dual Row Ceramic Ball Bearings - lowest friction and fastest spool/response
  • Water Cooled Center Section
  • Double seals on both turbine and compressor end for extreme durability and resistance to any oil seepage
  • Integrated Speed Sensor mounting provisions
  • Low Inertia Gamma- Ti Turbine Wheel
  • Stainless Steel Turbine Housing
Kit Features
  • mountune Ni Resist turbocharger adapter
  • Installation kit featuring all required oil lines and fittings
  • Preformed coolant hard line ensure trouble free installation and performance
  • m520 calibration (applied using mTune handset - required)
What's included
  • 1x mountune Ni-resist Cast Turbo Adapter Assembly
  • 1 x V-band sports cat downpipe
  • 1x mountune Configured BorgWarner EFR-7163 Turbocharger Assembly 
  • Turbocharger Gasket Set
  • Stainless Steel Hose Clamp Set
  • 1x Turbocharger Oil Inlet Hose Assembly
  • Hardware Kit
  • Inlet and Outlet Turbo Water Supply
  • 1x Tube Adapter, Turbo Oil Drain
  • 1x Gasket, Oil Return Tube
  • 1x mountune 5-Ply Compressor Outlet Silicone Elbow Hose
  • 1x mountune 5-Ply Compressor Inlet Silicone Elbow Hose
  • 1x V-Band Clamp, EFR Exhaust Outlet
  • XtremeDi uprated fuel pump
  • Performance camshafts and valve train 
  • Oil and filter change

What you need
  • Upgraded intercooler
  • mTune handset
  • mountune full Intake 
  • 3" inch exhaust
  • hardpipe
  • Forged engine internals

m520, for those that demand maximum performance, without compromise

Power output may vary based on individual vehicle condition, fuel grade and method of recording.

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