So I am new to Lancers I just bought a 2017 Lancer SEL with the 2.4 and AWD.
What suspension mods and intake and exhaust are the most recommended?

I am leaning toward strut bars front and rear first. I am having a blast on tight turns but can feel the flex when hitting them hard. I drive in 4 wheel drive period btw it feels more stable and the car sticks like glue. Not worried about the gas millage.
Also what seem to be the best tires.

 

I was a michellin fan, but after the defenders and premiers having vibration issues I gave up on them. I got some yoko yk740 and they are good. Hankook are good too.

 

I replaced the original Dunlop's with Continental All season sport tires and it made a big difference in handling. I am in the Chicago area and the first snow had the traction control hitting its limits now it is like night and day.