I like driving up in the hills, which is primiarly what I'm tuning the car for. I also believe that the stock MPS 3 shocks/springs were not matched ideally from factory hence why the shocks wear out so easily. I'll be changing to Eibach pro kit springs with Bilstein B8 dampeners. Once again, they are not perfectly matched but you won't be able to get that anyway with off the shelf parts without going to coilovers.
From my readings on the interwebs, chassis stiffening will allow the chassis to transmit weight quicker, hence a more responsive car. but once again, if the suspension isn't able to react quick enough, then added chassis stiffness is wasted.
GT Spec make a lot of bracing for the MPS 3 and 6
2007 ~ 2009 MazdaSpeed 3 | www.gtspec.com, I'm keen to try some of these, but want to get more information as to which areas the MPS3 chassis would benefit most. Any help here?