Must go down as one of the most “innovative” cheats of all times though.
That was the one where they had a turbo restrictor that looked like a solid machined piece, but could be opened out with a special tool and locked by clamping the hose on it and would snap back as soon as the hose clamp was released, right? So, unless the scrutineers knew exactly what to look for, it was nearly impossible to detect.
What I’ve always wondered about was, how many people knew? (Same goes for the Ferrari cheat.) Obviously, the engine designers sat down and deliberately designed it and there must have been one or two mechanics who were trained how to install it. Problem is, all the other mechanics must have known that some special protocol was triggered anytime that one hose clamp needed attention, so everyone in the garage must have known that something was going on. On top of that, the turbo would have been oversized and the dyno numbers must have been suspicious, so even engineers who didn’t know exactly what the trick was must have known something was wrong.
Which is the same as the Ferrari cheat. There must have been a bunch of people who knew that the numbers didn’t add up and it only takes one disgruntled employee to tell the scrutineers exactly where to look.