This quest was marked obsolete by Blizzard and cannot be obtained or completed.
Have Zamek create a diversion, then steal Rizzle's plans for Pozzik on the Shimmering Flats in Thousand Needles.
The Brassbolts brothers have discovered a new building material, that's the only explanation that makes sense. Their cars have been operating faster than before, but their designs, and all the other data we've gathered from their runs is identical.
What we do know, is that Rizzle Brassbolts has been focused on the plans for this new discovery almost constantly.
Zamek can create a diversion for you, so that you can steal those plans from them.