[thstone]

Don't be in a huge hurry to upgrade anything unless you are capable of out-driving the car or at the top of your car class.

Tires: If your existing street tires are not up to track service, getting too hot, or chunking; move to a higher performance street tire like the Hankook RS-3 or Kumho Ecsta XS or similar.

Brakes: Unless you are experiencing significant brake fade, stay with stock and add the cheap GT-3 brake ducts. When you start to experience brake fade, then move up to a street/track combo pad. Later, when you're frying pads and brake wear sensors, then move up to a track pad and zip tie up your pad wear sensors.

Suspension: Get a track alignment to get as much front negative camber as possible. Then drive it that way until you can out-drive the car and/or are shredding the outside edge of your tires on a regular basis. THEN think about a suspension upgrade.