2.4 intake

Hi guys! I have several doubts about the installation of 2.4 collectors.
What modification must be made in the alternator? Is it for the collectors to enter?
Once the collectors are set, what are the profits? I have to tune the modification to get a profit?
you need to remove the end plate and either modify it to clear the 2.4 inlet manifold or leave the end plate off and fit a separate noise suppressor