Factory turbo cars by the hundreds of thousands now cruise our nation's highways. That translates into plenty of used turbos just lying around waiting to be scooped up by the adventurous rodder for ...

The inline-four didn't get the best start, with early models limited to a humble 150hp at the flywheel, but output was increased to 180hp with a modified K03 turbo, then 225hp with a K04 in the Audi ...