I've been saving up for a major performance modification for my VVTL-i Corolla Sportivo and some of my friends have advised me that supercharging it would be better. I still would like to know more about this like how much would it cost me to have a turbo kit or supercharge kit? What are the best aftermarket or Toyota Racing Development products that are compatible with the Corolla Sportivo VVTL-i engine? And what shops and where in Melbourne, Victoria can I go to purchase these kits? Your advise is appreciated, Thanks