Knock Knock - Who's there? After buying the cheapest Yaris we could find, we big blocked it with a 1.8L and then slapped on the cheapest turbo in the world for $169. We ran up an incredible 200HP (150kw) at the wheels with Yaris Hilton. But our first street drive brought about a strange knocking sound from under the hood. In this episode we find out what went wrong, then add some wheels, tyres and lowered springs to get Yaris Hilton finished for the first proper street drive...