S Wave - Anti Roll Bar - Front 27mm - GR SupraS Wave Anti Roll Bar for GR Supra Front S Wave 27mm OEM 24mm Complete with bushes, brackets and bushing grease S Wave signature orange powder coating The fitting of larger sway bars has two main effects, vehicle balance in terms of understeer and oversteer, and increased roll resistance. Both of these can provide increased overall grip levels that can be achieved by the vehicle.