Proving Grounds

Leh puts an 18-wheeler on the track, Parker taps into his inner drift God in a Kia, and Sam tries both the Ford F-250 Tremor and Polestar 1.

A sandstorm hits the Proving Grounds and Leh tries to drift through it in Ryan Tuerck's drift car. Parker drives the most expensive Subaru sports car and loses $10,000 in an Audi R8. Sam drives the Land Rover Range Rover Velar SVAutobiography Dynamic Edition.