I have a 4pt LTB and the ES front LCA bushings which both are essentially the same thing as the Nismo bushings and the "underbrace". The underbrace/ LTB is a definite plus. The bushings is just icing on the cake to remove what little slop in the suspension is left. You may wanna look in the AutoX rules. IIRC having the underbrace/LTB will bump you up a class.