Radiator Heater Throttle Body Coolant Hoses

The HPS Performance 57-2081-BLK is a Black Silicone Radiator, Heater, and Throttle Body Coolant Hose Kit. It's designed as an essential upgrade for 1998-2005 Lexus GS300/GS400 models that have undergone a 2JZ-GTE VVT-i engine swap. The kit is engineered with 3-ply polyester reinforced silicone for high temperature service (Max. 350F) and includes 100% stainless steel non-perforated embossed hose clamps that are safe for silicone hoses. HPS Performance emphasizes that these hoses are designed in Solidworks with 3D scanning technology for accurate fitment, eliminating the need for splicing and reducing potential leaks. A key remark from the manufacturer is that silicone hoses have a water permeation rate 10 to 15 times greater than standard EPDM rubber hoses, so regular water level checks are highly recommended for daily driving vehicles.