Our BEST all purpose Miata sway bars are the Progress Technologies Miata Sway Bars. Our Best Budget Miata Sway Bars are the RoadsterSport Miata Sway Bars. Note we prefer to lower the Miata first with lowering springs or coilovers because that helps handling in all directions (less right and left lean AND less squat and dive, and lowering enables a performance alignment with a lot more ideal camber). Then we use sways to make the Miata even more flat in the turns and to tune the final balance. The only exception to that policy is running SCCA classes that require stock springs and allow us just a front sway bar change. Our own time attack Good-Win Racing ND Miata at Laguna Seca Raceway shown here with our OHLINS Miata Coilovers and Progress Miata Sway Bars.