Here my list, if I want to be in the modify class
1. Light weight rims (it make a whole of a differents on all cars)
2. rear sway bar (autocross YOU NEED ALL THE OVERSTEER you can get, more most tracks)
3. a nice set of springs or coilovers depending how you plan to use your car (no need to explain with this

)
4. I may get flame for this, but the J's roll center adjuster
At this point i would be done for a FUN autocrossing, but if you want great times. WE NEED MORE HP AND TQ
5. A nice cold air intake or a camber intake (I believe these would give you some more power, tq and more response from our weak fits)
6. Headers (MORE POWER AND TQ, if the car is for autocrossing I would go for more low end power)
7. Of couse we got to have the catback and muffler (Just because to want to sound fast

)
8. At this stage I would highly recommend better pads that can handle high temp
At this point, I'm running out of things to add, but here goes
9. The pulley set (More responses and it puts power to the grounds)
10. at the moment this should be more then enough for the fit, but IF YOU MUST HAVE MORE

. Get better bucket seats, and for the stick people add the lighter flywheel and a better clutch, lsd and a final gear set.
I may use up more then 10 in my list
P.S the reason I didn't mention anything about tires and big break kits/rearbreak dist, because I assume any one would get new tires when they get the rims, and with all those mods the fit would only have about 130whp (I hope) and the rear disk break is not out yet.