So what do you do when you've built your motor, strapped on the biggest turbo you can tolerate and basically tuned your forced-induction car to the teeth-but you still want more power? More boost ...

Hello David, a water-methanol injection (WMI) kit is designed for vehicles with forced induction systems, such as turbochargers or superchargers. This system injects a mixture of water and methanol ...

I know of a Toyota Vitz and a Subaru Forester that are equipped with water-methanol injection kits. Could you explain how these kits work, how they can be installed, and how much they might cost?