Tanabe Sustec Front Strut Tower Bar Toyota Yaris 07-11 The strut tower bar is arguably one of the least expensive upgrades that can provide a very high degree of benefit that is felt immediately after installing. Often one of the first modifications performed on a vehicle, the strut tower brace improves handling and stability of a vehicle. The Sustec Tower Bar has been very popular due to its low price and high functionality. By connecting the strut towers, and creating a balance, the shocks are prevented from independently moving and causing small changes in suspension geometry.