I´m thinking on removing the air pump and the ACV on my S4 N/A... And I was wondering that will I gain anything by doing this ?

 

No, and you might lose something on the performance end if you don't rely on something else to open up the secondary ports if your after market exhaust doesn't do it.

 

Where are my secondary/aux port actuators ?
So do I even have the 6/5 ports ?

 

Your pic shows they were removed but the air pump is also necessary to prevent the catalytic converters from being ruined. If you don't have those then you likely don't need your air pump. The ACV is for emissions.

 

The only benifit here would be engine bay clean up.

 

Here in Finland we don´t need to worry about emissions... And I don´t have my catalytic converter anymore, so I´m gonna ditch my airpump and the ACV...

Thx guys... This helps a lot