This is a replacement Kyosho 2.8mm Rear Stabilizer Bar. Effects of Rear Roll Bar Adjustment  Stiffness  Characteristic  Softer Increased Rear Chassis Roll Increased Rear Traction Decreased Front Traction Decreases On Power Steering (May Cause Understeer)  Stiffer Decreased Rear Chassis Roll Decreased Rear Traction Increased On Power Steering (May Cause Oversteer) Quicker Steering Response in High Speed Chicanes