What is a plenum? Is it only on infiniti cars?

[paulchullee]

What exactly is a plenum? I know the intake leads to it but why have I only seen it on infiniti g's?

 

[booyahbd]

After typing "intake plenum" into a search box and reading the results, I found this: http://wiki.answers.com/Q/Where_is_the_intake_plenum

And this: http://en.wikipedia.org/wiki/Manifold_%28automotive%29#Volumetric_efficiency

And this: http://www.custom-car.us/intake/intake-manifold.aspx

On the first page.