Well, it depends. It depends on how "daily" is your car driven. How competitive you want to be at the autocross or time trial. And what sort of budget you have.
Not to cop out, but for one scenario or another I've recommended every part on our site, and a couple others that we don't sell direct.
But, they do start falling into patterns.
Daily driver that wants to have fun at an autocross but isn't worried about being competitive?
Bilstein StreetPro kit with the Ford Racing "K" springs and
Vorshlag camber plates (included with the kit)
Whiteline front and
rear sway bars
Whiteline adjustable rear panhard bar
Whiteline rear relocation brackets (that work with the stock lower arms)
18x10 wheels with decent high performance tires
Taking up track days or serious autocrossing as a hobby, but the car still needs to be street driven?
Rear relocation brackets and
adjustable lower arms
Whiteline front and
rear sway bars
AST 4150 or
MCS TT1 struts with stiffer springs and Vorshlag camber plates
Whiteline Watts link (quiet enough for street use)
Depending on class rules and the tires you will be using, either
18x10 D-Force wheels or
18x11 and 18x12 Forgestar wheels
Front and
rear brake pads and
fluid
And if you have the budget, use the Ford Racing steering rack and the
Energy Suspension front arm bushing
Beyond that? A dedicated competition car will be more rules and budget driven and will have too many options that "depend" on rules and other things.