Alloy Radiator Upgrade - RS

The new mountune Focus RS high performance Aluminium Triple-Pass Radiator has been tested and validated over thousands of miles in high-powered EcoBoost applications, as well as proven on the track in the most demanding conditions.

The mountune Focus RS alloy radiator features CSF’s exclusive B-Tube technology, as well as an ultra efficient multi-louvered fin configuration, for maximum surface area contact and heat dissipation. Additionally, the triple-pass flow structure allows the coolant to flow across the core 3 times before exiting the radiator for the lowest outlet temperatures possible.

Designed and engineered to be a hassle-free, drop-in install, all original mounting brackets have been CNC machined for the purpose of allowing the original fan assembly to bolt on without hassle, whilst allowing the new core to easily drop in place without any modifications required.

Once the OEM radiator’s performance is maxed out and coolant temperatures rise, the vehicles protection system activates “limp mode”, reducing engine performance and power. This situation is a typical occurrence during track days and sustained high speed use.

The mountune high performance triple-pass alloy radiator upgrade maintains and stabilises outlet temperatures for constant and consistent performance throughout a wide range of demanding driving conditions. Significantly reducing the risk of power loss while protecting your engine when it’s needed most.


  • Improved cooling performance
  • 10% peak outlet temperature reduction  
  • Easy installation, bolt-on performance
  • Triple pass core with B-Tube technology
  • Black powder coated finish
  • Track tested
  • Engineered to improve performance on both stock and modified cars
  • Compatible with original cooling fan
Customer Reviews
5.0 Based on 7 Reviews
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Filter Reviews:
    Jamie P.
    United Kingdom United Kingdom
    Alloy Radiator Upgrade - RS

    This is another well designed and presented item from the team at MT. A shame that it is hidden away in the cooling pack of the vehicle. The triple pass also allows for better cooling than the OE part. I had this fitted with the M400X and engine forge to complete the package.

    Jon .
    Mountune Radiator

    Had this fitted to compliment the Mountune oiler cooler. Excellent customer service as always. See you soon for my next instalment

    Paul H.
    Mountune triple pass rad

    I already have the intercooler and the oil cooler so this is the final piece of the cooling jigsaw great quality as always and service to match. Big thanks to Fred, Ryan and the Mountune team. � I would recommend this to anyone that has already got the intercooler and oil cooler as lower temps equals sustained power.!!