The new Roadster includes some chassis bracing as standard. These factory installed parts are quite thin and something of a compromise between function and cost. If you want to improve your car's handling you need to look to the aftermarket. There are already several options available to upgrade the factory bracing with more substantial designs and stronger materials.
AutoExe - signature red finish, steel construction
Mazdaspeed - from the genuine accessory catalogue
Kansai Service - 3mm front steel plates, aluminium bar
Kansai Service - aluminium
Kansai Service - chromium molybdenum alloy with steel brackets
Cusco - signature blue finish, sections sold seperately
Cusco
Nielex steering knuckle brace
Beatrush rear tower brace
Okuyama Carbing - 3 piece set
Beatrush four piece set