Koyorad Aluminium Radiator for Lexus IS250 & IS350 (05+) DiagramKoyorad Aluminium Radiator for Lexus IS250 & IS350 (05+) DescriptionIdeal for use both on and off the track this Koyo Performance aluminium radiator will considerably improve your engine cooling. Made from aviation grade aluminium TIG welded and with a high quality polished finish it goes directly in place of your existing radiator without any modification : using the same mounting brackets stock fans and/or shrouds sensors drain plugs etc.N-Flo TechnologyKoyo offer their innovative N-Flo technology fitting their radiators with N shaped internal partitions. This exclusive design allows the coolant to flow through the radiator for longer and ensures effective cooling across the whole surface (unlike standard radiators where the coolant usually flows diagonally). N-Flo technology combined with the high thermal conductivity of the aluminium guarantees up to 50% better cooling efficiency than stock lower operating temperatures and improved engine reliability.The photo here is a generic visual provided by the manufacturer. The diagram above represents the actual product for your vehicle.