Upgr8 U8919-2 High Performance 4-ply Red Radiator&heater Silicone Hose Kit Applications: 00-07 Subaru Impreza WRX/STI GDA/GDB/GGA/GGB EJ20/EJ25 Engine. Min temperature: -60 C/-140 F. Max temperature: 220 C/428 F. work pressure: 0.3 to 0.9 MPA. Bursting Pressure: 2MPA. Thickness: 5MM. Size tolerance: +/- 0.5MM.