Part 5/9:
With only a few days before the wedding, the duo continues until they find themselves on an expansive desert. McQueen challenges Mater to a race, during which they are overtaken by a speedy vehicle sounds ominous in its pursuit. They arrive at the record-breaking hub of cars eager to push their speed limits. Here, Mater expresses a desire to be modified for speed, against McQueen’s cautious advice.
As Mater undergoes a dramatic transformation, the duo sees success turn sour when Mater's vehicle modifications lead to a disastrous failure. After gaining thrilling speeds and shattering records, Mater loses control and faces the Speed Demon, a ghostly entity associated with speed. However, through cleverness and bravery, Mater deceives the spirit and manages to reunite with his body.