Upgr8 Subaru Impreza WRX STI High Performance 4-ply Turbo Inlet Intake Silicone Hose Kit (Blue) Applications: 98-00 Subaru Impreza WRX/STI GC8 VERS 5-6 EJ20 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.