Originally Posted by
Fartblood
Some pro driving tuition. Pound for pound it'll improve your lap times more than any single mechanical mod. Ensure you can extract ever last ounce of performance out of yourself before spending on the car. It'll also teach you where you car is deficiant, so it allows you to spend your money more effectively further down the line.
100% this.
Then take out weight where possible and fit some good quality track rubber.
Then get even more training and never stop, keep an open mind as there is always something to learn and you will enjoy track days much more with every step you learn.