My car is a UK Turbo 2000 , year 2000. The engine is standard power out put, it has a Hayward and Scott back box as fitted by previous owner.

I am looking for reliable power upgrades. Car is used for track day use 99%, although I drive the car to events, so needs to remain road legal, and pass 98db noise test.

Whats the most successful all round power upgrade? Am not looking for £99 bolt ons either, will be prepared to invest in a good solution.

Cheers
Richard.