Heavy Duty Silicone Intercooler Boot Kit For 03-07 Dodge Ram Cummins 5.9L Diesel. Designed to replace stock OEM hoses which can eventually weaken over time, leading to premature failure. No more worries about hoses blowing off during the competition or daily driving. Designed to withstand over 100 PSI of boost and ensure the long lasting quality. (4) Heavy Duty Silicone Boots.