Left.W/O DYNAMIC CHASSIS CONTROL. Right.W/O DYNAMIC CHASSIS CONTROL. Upper mount bolt. A Bolt used to secure a Suspension Shock Absorber. A threaded rod with a drive head (such as hex, 12 point, torx, etc.) on one end used to secure the Floor Pan Crossmember to it's Mounting point. Part cannot be reused/reinstalled. Cross bar. Floor Pan Crossmember. HEXAGON - HEAD. Suspension Shock Absorber ing. Top nut.