The commercial states that the engine was "born from Honda's legendary racing heritage." What exactly does this mean? Unless the screaming 2.4 liter V8s of 2008 had illegitimate relations with a diesel truck, I haven't a clue. Formula 1 is never specifically mentioned in the commercial but that's what springs to my mind. However, let's give them the benefit of the doubt.
There would seem to be three viable options for where the "trickle down" technology came from. In no particular order, they would be Japan's Super GT series, MotoGP, and the Indy Racing League. These are the most prominent series where Honda currently participates.
I'll take Honda up on their offer after they build street versions of these.