Koyorad has engineers their radiators with precision, to directly replace the OEM radiator, maintaining all mounts for the factory fans, fan switch, A/C condenser, and factory hoses. Koyorad’s advanced engineering and design methods, impeccable welds, experienced furnace brazing, and triple pressure testing for quality has earned their excellent reputation in performance. Koyorad thick dual core half-size radiator for D-series (28mm inlets) or B-series (32mm inlets) engine. Features HH series 48mm Hyper core radiator Precise tube and fin alignment Billet filler neck Nocolok-R brazing with brushed finish High density fully brazed Hyper Core Precision TIG welded Dual row construction Bolt-on fitment with OEM fans, hoses, and sensors 1/8” NPT female accessory fitting Billet drain plug included Triple Pressure tested for high performance needs Radiator cap not included Vehicle ApplicationsFor manual transmission applications only 92-95 Civic (SOHC - 28mm inlets) 92-97 Delsol (SOHC - 28mm inlets) 94-97 Delsol Si VTEC (DOHC - 32mm inlets) 96-00 Civic (SOHC - 28mm inlets) 99-00 Civic Si (DOHC - 32mm inlets) *Note: DOHC version has larger diameter (32mm/1.25") upper and lower water inlets for B-series radiator hose fitment.