Not too difficult. The time to beat is a little over hard ghosts time and a lot behind expert ghosts. Begin the race and drift boost to get going. Take the left path (not the lower one with crates) and when you hit flying mode, abuse the plane drift boost while hitting the boost pads. As you go through the rock and come to the car transformation zone push right stick forward and pull a stunt off before turning into a car to get a nice transform boost. Then take the boat area and launch off the platform and pull off 3-4 rolls or flips and hit the boost pads. Use the boost item you have just before transforming into a car for the final time and you should nab it.