This rubber hose carries pressurized air from the engine’s turbocharger outlet to the intake manifold. It connects the charge-air system between the compressor housing and the aftercooler or intake elbow. A cracked or collapsed hose causes a boost leak, which reduces engine power and increases exhaust temperature. The hose is molded to the original bend radius and end-profile geometry so it seals against the turbo outlet and intake connections without additional adapters. On installation, ensure the hose is fully seated on both ports and that the clamps are torqued to specification to prevent blow-off under boost pressure.