Pro Alloy Radiator. [Focus ST RS MK2] Dreamscience Motorsport KOYORAD ALL ALLOY PERFORMANCE 53MM RADIATOR EVO 4 6 AK Racing Koyorad Aluminum Racing Radiators CARiD.com Koyorad Aluminum Racing Radiators CARiD.com. Koyorad is proud to introduce an all aluminum performance radiator for the 2013 2017 Ford Focus ST. This radiator features Koyorad's NFLO triple pass technology which directs coolant in three directions through the radiator. Internal partitions are strategically placed to promote complete core coverage for improved efficiency over OEM style single pass radiator configuration. In addition the core thickness has been increased to 36mm, a 44% increase over the OEM unit and utilizes Koyorads high density tubes and fins to boost the vehicles heat capacity and endurance under extreme use. Factory fans, AC condenser, OEM coolant hoses and OEM mounting provisions are retained, requiring no modifications. Koyorads advanced engineering and design methods, impeccable TIG welds, proficiency in furnace brazing, and triple pressure testing for quality has earned their excellent reputation in performance cooling worldwide. Features: NFLO Triple Pass Technology 36mm High Density Hyper Core All aluminum construction TIG Welded and furnace brazed construction Billet aluminum filler neck and drain plug Compatible with OEM fans, hoses and mounting provisions Side plates with thermal reliefs to improve core resiliency Triple pressure tested during manufacturing process Application: 2013 2017 Ford Focus ST 2. 0L