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Mk3 Focus RS Alloy Radiator Upgrade - Fully fitted at mountune HQ

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 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

Please note: the price shown for this product includes installation* at mountune HQ in Hutton, Essex and is not transferrable to any other Ford dealer or installer.

Please specify your preferred installation date in the 'notes' section when checking-out; our workshop team will then contact you back to confirm this date. If we can't accommodate your preferred choice, the team will discuss with you other available dates, that are still acceptable to you.