Upgr8 Audi Volkswagen High Performance 4-ply Turbo Induction Silicone Hose Kit (Blue) Applications: 99-05 Volkswagen Golf/Jetta/Beetle MK4 1.8T Engine. 99-05 Audi TT 1.8T 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.