intake hoses

what is the intake hose that runs to the back of the motor and plugs into your intake

Have a picture?

3100 motor, right?

Does it go to the brake booster?

Or is it the rigid plastic hose that goes from the intake to the back valve cover?

its a hard hose that goes to the back of the valve cover from the intake

Its for the PCV system. I am not sure what the exact name for it is. Why you ask?