I think Brabus springs etc will give you what you want, where to get 'em, that I do not know. I would try one of the sponsors on here, i.e., SmartMadnessAfter decided to just keep my 2013 451. I am tempted to upgrade the suspension. I would like something a little more firmer and "Sturdier". Has anyone had any luck with any aftermarket suspension that will not break the bank?