The Tanabe Sustec Under Brace bars are an excellent way of increasing underbody rigidity. These underbrace bars will reduce body flex while cornering and will obtain more responsive handling characteristics. The Tanabe Sustec Under Brace bars also use a hollow "Double I" design which reduces weight and increases rigidity. These bars connect using two strong points under the chassis and on certain applications, four points. Depending on the application, you can choose either front or rear.