Quick view Koyo Koyo Aluminum R-Core Racing Radiator - Corolla AE85 AE86 83-87 Koyo R-Core Radiators feature a 53mm (2 1/16") thick aluminum core. Koyo radiators are made with very high quality control and state of the art brazing furnace to ensure there are no leaks... R6,458.08 R6,856.30 Add to Cart 3 4 5 6 7 8