Outland manifold/throttle body swap

I have located both an outlander intake manifold and throttle body. I have some questions about putting them together. The manifold is a 2003 intake manifold which means it should be non mivec. The throttle body is a 4 cylinder throttle body from a 2003 outlander. The throttle body is from an AWD model outlander. Does it make any difference? Can I swap an awd manifold from a 03 outlander onto a 2001 galant with the 03 intake manifold?

Do I need a V6 outlander throttle body or will this 4 cylinder outlander throttle body work?
It says it is an awd throttle body I'm not sure if that makes it any different?
Is there a noticeable performance gain?
Does mileage improve?

My car is a 2.4 Thanks.