if i were setting up a car for autocross or track abuse...

first thing would def be brakes, then tires, then suspension. in that order. i speak from experience in that both my 240sx sr20t and integra gsr both went out for 20 min road course and second lap for the 240 it had no brakes and integra lost its about 15 minutes in. that and both cars just slid everywhere on the crap tires.

i run metal master/pbr axis pads, goodridge ss brake lines, ate blue brake fluid now. tires can vary but power dosn't help anything unless you can stop it and get grip ! also on a side note a good seat with side bolsters and a harness also keeps u nice and planted, ud be surprised at how the g force in turns can mess up with gas brake and clutching.