What is the tube between the air box and plenum called?

[Steve Tinker]

Thanks for the link Topless - your SAE paper seems to confirm my findings.
Ricardo Engineering has an enviable reputation in Europe for their state of the art engineering going back to the 1920's, probably one of the best consultants in the world....
We all want to improve on the design or efficiency of our vehicles, but sometimes the factory engineers who have access to millions of dollars worth of equipment really know what they are doing - or at least should do....
Unfortunately, the bean counters have a bigger and bigger hand in the final product.