Mishimoto MMHOSE-WRX-01BL Subaru Impreza WRX and STI Silicone Radiator Hose Kit, 2001-2007, Blue Direct fit for 20012007 Subaru WRX and STI INNER DIAMETER: 1.5" OUTER DIAMETER: 1.85" Maximum Temperature: 330F Constructed with high grade silicone and heat-resistant embedded fibers Mishimoto Lifetime Warranty Interior Material: Heat-resistant embedded fibers Exterior Material: Silicone Maximum Temperature: 330 F Inner Diameter: Hose 1: 1.5", Hose 2: 1.5" Outer Diameter: Hose 1: 1.85", Hose 2: 1.85"