All the mods that you are choosing to do are not going to make the car any faster. It is all for looks. Let me break it down for you.
The coilovers, rotors and sway bars will make the car handle better, but it will not make it any faster.
The windsplitter will not do anything to help you unless you are going over 120mph, which I bet is the top speed of that car anyway. So that thing is useless.
The cold air intake and SCT Tune might....MIGHT.... give you 15-20 horsepower. Maybe.
The carbon fiber body kit is not going to do anything but piss you off. Aftermarket body kits never fit the car properly and break very easily.
Now to the rims. Good luck getting 20 inch rims to fit on the car with coilovers. 20s are the biggest wheels that will fit on that car. However, if you put coil overs on then you will certainly end up lowering the car. If you do that, then you will not be able to fit the 20s on there unless you set the ride height of the car back to stock thus defeating the purpose of all the suspension mods that you did.
Will the wheels hurt your performance...yes. The added weight will slow the car down....slightly. You won't be able to feel it. It will be the equivalent to losing about 3 horsepower. Those big wheels will also make the car handle worse and will offset all the suspension modifications you did. I would not go with anything bigger than an 18 inch rim.I need Car Tuner help?All that on a fusion?