A pipe that transfers compressed air to from the turbo or super charger to the intercooler.
Turbocharger Intercooler Pipe
Fits RS6, RS7
Turbocharger Intercooler Tube - Repair or Replace
If your is equipped with a turbo and you've noticed a reduction in acceleration or a hissing on acceleration accompanying your check engine light, your intercooler or its piping/tubes may need to be repaired or replaced.