Prepare your semi truck to be Ready for the Road Ahead™, with the Flex Technologies 3.5" x 6" Intake Charge Air Hose that seamlessly transfers filtered air for combustion. To make certain the engine is using clean air in the combustion process, this replacement hose transfers clean air from the air filter to the motor. Fashioned with a flexible and sunlight-resistant material to resist cracks and breaks. FleetPride is your First Click in Heavy Duty®.