Air Intake Cleaning

[Pokes277]

I am wanting to clean the air intake manifold on my 06 Charger 3.5L

I have already removed it from the car.

What is the best way to clean the intake?

[fnkychkn]

upper intake plenum is best cleaned when installed on a running engine using something like this: http://www.gunk.com/CAT_M4712_6.asp