Trac Links: Also know as Traction links these links help locate the rear end under load.  As the suspension squats these control how much climb the rear wheel imparts on the other links and provide driver feedback on traction.

Location: Front lower link of rear suspension, sometimes called a torque link.

Features:

• Adjusts rear caster angle, Camber without affecting toe. A perfect add-on for vehicles with MEGA Arms and Toe links. Note: for initial camber adjustment FIGS suggests MEGA arms first as the work to counteract the toe links. This balance is what saves tire wear, not camber itself.
• Increased rear steering feel. Replace the rear knuckle bushing at the same time for the best results. 
• Added strength over stock parts for better power transmission to the ground.
• Top quality materials and workmanship mean you are buying the best product on the market compared to low quality competing parts.