Koyo Performance Radiator Subaru Impreza / WRX STI 2008-2021 / Legacy / Liberty / XV MT

Koyo Performance Radiator – Subaru Impreza / WRX STI / Legacy / Liberty / XV MT Application: Subaru Impreza / WRX STI / Legacy / Liberty / XV | EJ20 / EJ257 / FB20 Petrol AWD | Manual Transmission Part Number: VH091662 / KV091662 The EJ-series Subaru platform is one of the most popular and enduring performance foundations in the world — from the Impreza and WRX STI to the Legacy/Liberty GT and XV. Whether it's a street build, a rally car, or a track weapon, keeping coolant temperatures stable is fundamental to getting the most out of these turbocharged boxer engines under sustained load. Koyorad's all-aluminium radiator is a direct bolt-in performance upgrade across the GH8, GRB, BL5, BP5, VAB, and G-series platforms, engineered to the same factory fit and mounting points as the OE unit. Nocolok furnace brazed, precision TIG welded by hand, and triple pressure tested — it retains all OEM fan shroud mounts and stock hose connections with no modifications required. Why Koyorad? Precise Tube & Fin Alignment — Strict quality control ensures optimal coolant flow and maximum heat transfer efficiency across the entire core. Nocolok Furnace Brazing — All tubes, fins, headers, and brackets are bonded in a state-of-the-art Nocolok furnace, creating a structure that resists vibration, road debris, and the elements. Billet Filler Neck — Precision-machined billet filler necks are fitted to every unit for superior strength, durability, and a reliable seal. OE-Specific Mounting — Application-specific mounting points for fan shrouds, inlet/outlet hoses, and top/bottom pins ensure a pain-free, no-modification install. Hand-Crafted Heliarc Welds — Each radiator is individually Heliarc welded by hand, creating the strongest possible aluminium-to-aluminium bond across all components. Specifications Part Number VH091662 / KV091662 Core Thickness 36mm Core Dimensions (H × W) 340 × 677/701mm Tube Pitch 43/43 × 713mm Inlet / Outlet Diameter Ø38mm (bottom) Construction All Aluminium, Nocolok Brazed, Heliarc Welded Transmission Manual (MT) Fan Shroud Retains OEM mounts Hoses Compatible with stock radiator hoses Fitment Direct bolt-in, no modifications required Cross Reference Koyorad VH091662 / KV091662 Subaru OEM 45111 AG010 / 45111 AG011 / 45111 AG030 / 45111 AG031 / 45119 AG010 / 45119 AG030 / 45119 FG010 / 45119 FG030 / 45119 FG050 / 45119 GA010 / 45119 SC010 / 45119 SC090 / 45119 VA000 / 45119 VA010 Fitment Year Make Model Chassis Submodel 2003+ Subaru Impreza CBA-GH8 EJ25 Petrol AWD 2008–2009 Subaru Impreza / WRX STI CBA-GRB EJ25 Petrol AWD 2003+ Subaru Legacy / Liberty TA-BL5 (4D Sedan) EJ25 Petrol AWD 2003+ Subaru Legacy / Liberty TA-BP5 (5D Wagon) EJ20 Petrol AWD 2003+ Subaru Legacy / Liberty UA-BL5 (4D Sedan) EJ25 Petrol AWD 2003+ Subaru Legacy / Liberty UA-BP5 (5D Wagon) EJ20 Petrol AWD 2014+ Subaru WRX STI GBA-VAB (4D Sedan) EJ25 Petrol AWD 2011+ Subaru WRX STI G3 (4D Sedan) EJ257 2.5L Turbo Petrol AWD 2011+ Subaru XV G4 (5D Hatch) FB20 2.0L Petrol AWD Installation Notes WRX models with 13mm turbo return pipe: Trim the return pipe as required. The optional coolant port uses an M14-1.25 thread. Automatic transmission vehicles: Compatible, however an external transmission oil cooler is required — sold separately.