Answering my own question
F SPORT models further benefit from the lateral performance damper system, which is designed to absorb and minimize undesirable body vibrations, offer a more linear steering feel and contribute to improved ride comfort.
In lieu of conventional fixed bracing, the system features a front performance damper connecting the left and right front suspension towers, and a rear damper connecting the left and right sides of the rear lower back panel.
With a construction similar to that of a typical monotube suspension damper, the front and rear performance damper assemblies differ according to the variations in body rigidity, noise and vibration of their surroundings, optimizing their ability to absorb body torsion, flexure and fine vibrations.
Their installation has reduced vehicle floor vibrations across a wide frequency range, reduced body deformation through a drop in left and right front suspension tower displacement, and even lowered audio system white noise levels.
Though difficult to analyse even using Computer Aided Design, micron- sized, minuscule vibrations manifest themselves as a slight discomfort when turning the wheel and minute deviations in vehicle behaviour during straight line acceleration. Their elimination brings a new dimension of steering response, agility and ride comfort to the premium SUV segment.
It consists of two braces that bridge the front and rear chassis rails; each includes an integral gas-charged shock absorber. Unlike a chassis enhancement such as a shock tower brace, which lends rigidity, the lateral dampers' function is to compensate for small body-shell deformations and vibrations. Lexus makes no claims for increased stiffness. Rather, by damping structural quivers, the system is designed to reduce vibration and enhance ride quality.