Lower Arm Bar
A lower arm bar/ lower tie bar is an alloy/steel bar that ties the lower suspension pick-up points of a vehicle (with an independent suspension) together. It increases chassis rigidity by bracing the left and right lower-control-arm sheet metal mounting points. The lower tie bar is designed to reduce the non-pivoting movement of the control arms and to stiffen the subframe to lessen the distortion of the lower suspension, especially during hard cornering. As a result, it improves the handling and steering response of the vehicle much like a strut bar. A lower tie bar may provide additional benefits in front-wheel drive vehicles by reducing wheel hop and torque steer. The bar lowers ground clearance by approximately 30 millimeters on most aftermarket installations.
Lower tie bar (in stainless) attached to a rear subframe.
The lower tie bar is mostly an aftermarket car component. Some of the few exceptions to this rule are the Honda Integra and Civic Type-R, as well as the Daihatsu Charade GTti. Since the lower tie bar is one of the cheapest upgrade that tuners can install on their cars, it is probably one of the first performance accessories that is acquired. The lower tie bar is a bolt-on device and no stock parts will have to be replaced or removed when it is being installed on the vehicle (unless the vehicle already has one on it). These characteristics make the lower tie bar a popular performance upgrade among car tuning enthusiasts.