What are Strut bars?
Strut tower braces metal braces go across the car and are attached to the front and rear shock towers to reinforce the body and increase overall rigidity of the body. These braces prevent the shock towers from flexing under heavy suspension stresses in order to increase handling and preserve correct suspension angles during hard cornering. Plus, they look cool. Answer was adapted from www.bmwtips.com. These also tend to work only under extreme cornering such as in autocrossing and track events and with other high performance suspension components such as the springs, shocks, and sway bars. One downside is in cases of a side collision, the strut bar could cause damage because it transfers the impact to the opposite side of the car.
