Razzeric is standing in front of the green containers behind Pozzik (the quest giver). Coordinates (80,76). Speak with Razzeric to turn in the quest.
I'm going to be busy with working on integrating this new fuel regulator to our racer designs, but if you'd like to help out the team some more, talk to Razzeric. He's our pilot--well, our eighteenth pilot, to be exact--and he likes to add his own little modifications to the racers.
He's a little off his rocker, though, so try not to act too surprised.
You're the <race> that's been helping Pozzik out, right? I was like you once, running around the pit area, helping with whatever work the mechanics would let me do.
Now look at me! The goblin racing team's pilot extraordinaire!