{"product_id":"koyorad-performance-radiator-lexus-is250-is350-gse20-gse21-gse25-2005","title":"Koyorad Performance Radiator | Lexus IS250 \/ IS350 GSE20 GSE21 GSE25 (2005+)","description":"\u003ch2\u003eKoyo Performance Radiator – Lexus IS250 \/ IS350 GSE20 \/ GSE21 \/ GSE25 2005+\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eApplication:\u003c\/strong\u003e Lexus IS250 \/ IS350 | DBA-GSE20 \/ DBA-GSE21 \/ DBA-GSE25 | 4GR-FSE \/ 2GR-FSE | 2005+\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003ePart Numbers:\u003c\/strong\u003e KH011937 (Koyorad) \/ KH011937 (Coore)\u003c\/p\u003e\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\u003cp\u003eThe Lexus IS250 and IS350 represent the sharp end of Toyota's rear-wheel-drive performance sedan lineup — refined, capable machines that are increasingly popular as track and street performance builds. The 4GR-FSE and 2GR-FSE engines are smooth, high-revving units that benefit from improved thermal management, particularly under sustained high-load driving conditions.\u003c\/p\u003e\u003cp\u003eKoyorad's all-aluminium KH011937 is a direct bolt-in performance upgrade engineered specifically for the GSE20-series IS platform. 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.\u003c\/p\u003e\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\u003ch3\u003eWhy Koyorad?\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecise Tube \u0026amp; Fin Alignment\u003c\/strong\u003e — Strict quality control ensures optimal coolant flow and maximum heat transfer efficiency across the entire core.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNocolok Furnace Brazing\u003c\/strong\u003e — 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.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBillet Filler Neck\u003c\/strong\u003e — Precision-machined billet filler necks are fitted to every unit for superior strength, durability, and a reliable seal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOE-Specific Mounting\u003c\/strong\u003e — Application-specific mounting points for fan shrouds, inlet\/outlet hoses, and top\/bottom pins ensure a pain-free, no-modification install.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHand-Crafted Heliarc Welds\u003c\/strong\u003e — Each radiator is individually Heliarc welded by hand, creating the strongest possible aluminium-to-aluminium bond across all components.\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable style=\"border-collapse: collapse; width: 100%;\"\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003eKH011937\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003e\u003cstrong\u003eCore Thickness\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003e48mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003e\u003cstrong\u003eCore Dimensions (H × W)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003e375 × 704\/728mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003e\u003cstrong\u003eTank Dimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003e55\/55 × 735mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003e\u003cstrong\u003eInlet \/ Outlet Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003eTBA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003e\u003cstrong\u003eConstruction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003eAll Aluminium, Nocolok Brazed, Heliarc Welded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003e\u003cstrong\u003eFan Shroud\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003eRetains OEM mounts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003e\u003cstrong\u003eHoses\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003eCompatible with stock radiator hoses\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003eDirect bolt-in, no modifications required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\u003ch3\u003eCross Reference\u003c\/h3\u003e\u003ctable style=\"border-collapse: collapse; width: 100%;\"\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003e\u003cstrong\u003eKoyorad\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003eKH011937\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003e\u003cstrong\u003eLexus \/ Toyota OEM\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003e16400 31440\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003ctable style=\"border-collapse: collapse; width: 100%;\"\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003cth style=\"border: 1px solid #ddd; padding: 8px 12px; text-align: left;\"\u003eYear\u003c\/th\u003e\n\u003cth style=\"border: 1px solid #ddd; padding: 8px 12px; text-align: left;\"\u003eMake\u003c\/th\u003e\n\u003cth style=\"border: 1px solid #ddd; padding: 8px 12px; text-align: left;\"\u003eModel\u003c\/th\u003e\n\u003cth style=\"border: 1px solid #ddd; padding: 8px 12px; text-align: left;\"\u003eChassis\u003c\/th\u003e\n\u003cth style=\"border: 1px solid #ddd; padding: 8px 12px; text-align: left;\"\u003eSubmodel\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003e2005+\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003eLexus\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003eIS250\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003eDBA-GSE20\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003e4GR-FSE 2.5L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003e2005+\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003eLexus\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003eIS350\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003eDBA-GSE21\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003e2GR-FSE 3.5L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003e2005+\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003eLexus\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003eIS250\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003eDBA-GSE25\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px 12px;\"\u003e4GR-FSE 2.5L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\u003cp\u003e\u003cem\u003eSold individually. Lead times may apply — contact us at Coore for availability and shipping estimates.\u003c\/em\u003e\u003c\/p\u003e\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eCoore Performance \u0026amp; Aftermarket is an Authorised Australian Distributor of Koyorad Performance Radiators.\u003c\/strong\u003e\u003cbr\u003eShop with confidence — all Koyorad products sold through Coore are genuine, backed by manufacturer support, and shipped from Australia.\u003c\/p\u003e","brand":"Koyorad","offers":[{"title":"Default Title","offer_id":66757564825904,"sku":"KH011937","price":799.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0934\/3156\/2544\/files\/s-l1600_4.webp?v=1778545656","url":"https:\/\/coore.com.au\/products\/koyorad-performance-radiator-lexus-is250-is350-gse20-gse21-gse25-2005","provider":"Coore | Performance \u0026 Aftermarket","version":"1.0","type":"link"}