Use the following cars to defeat Ryo Watanabe. Upgrade all cars with Level 4 performance parts and max out the aerodynamics. Note: Bring lots of Total Markers to Race Day.

Grip: Pagani Zonda. Use a "Free Car Marker" for this car, if available. You can also use this car to defeat the Grip King.

Drag: Ford Shelby GT500 or Chevrolet Chevelle SS. Do not do anything to the aerodynamics of the Chevelle. You can also use those cars to defeat the Drag King.

Drift: BMW Z4 M Coupe. Even though it has low stats, it is a great drift car. You can use this car to defeat the Drift King. Alternately, use the Mazda RX-7 if you have won it from the Drift King. It already has all Level 4 performance parts; all you have to do to it is increase its aerodynamics.

Speed: Ford GT. You can also use this car to defeat the Speed King.