I'm going to say on a lowered car with some suspension modifications, obviously, that chasis reinforcement is needed. I would go atleast a front upper bar and rear upper (TRD
or Hypermotive 3 point). The rear really needs it due to the design of our "hatchback" cars. Some say the front isn't needed because it will cause a little more "push" while driving. I believe because of the engine weight that a bar across those strut towers wouldn't hurt in the least controlling chasis flex. You should notice a slight difference either way, not like a stiffer sway bar difference.