How to modify my 2001 ford focus ZTS?

I know my 2001 ford focus ZTS doesn't have much room for improvement in performance but what kind of performance modifications can I do? ECU tuning chip? Headers? Performance rotors and breaks? Lowered suspension?

Modify for what?

Autocross?

Drag strip? 1/8th or 1/4 mile?

Comfort/handling?

Dumping money into a 14 year old car that never sees a track and works fine as is is basically the same as flushing money down the toilet.

Even headers will need a dyno tune by a professional to get any noticible gains. You are changing one part of a complex and finely tuned system that took engineers years and millions of dollars to design and develop.

I always recommend the best rubber and shocks you can find within your budget before even thinking about touching the engine. You will get instant real-world results that you can actually feel, vs. A few hp at wide open throttle on a dynometer.

15 years old? Get it nearer to factory specs.

This is the 4th time you asked this question in 24 hours. Stop spamming.