2003 chevy malibu 3.1 liter V6 MAF sensor

[redfury]

As far as the line goes, you don’t have to use the one on the new intake if the purpose is already resolved by the intake manifold. All that hose is there for is to allow the engine block to circulate air through the PCV valve and back into the intake. You are better off having the non PCV side of the system either being dumped into your air cleaner box or after the throttle body to avoid things from getting mucked up with oil residue.