Sustec Strut Tower Bar Whenever driving aggressively, a vehicle"s suspension can only work just a hard as the stiffness of the chassis permits. Increase the rigidity of the vehicle"s frame resulting in improved, predictable handling. A reinforced lip is used to reduce bending of the bar. A specially designed bar with a hollow center and reinforced side walls for increased rigidity and reduced weight, extremely flex resistant. A polished finish for added good looks.