Before i had my front sway bar installed, i had just my coilovers and rear sway bar and that combination was excellent (only gotten better with the front sway bar). The rear sway bar definately stiffens the car up, however in my experiences it has lead to some slight oversteer under heavy acceleration, whilst cornering. I dont think you will regret buying it, either way if your not happy with it im sure someone on this forum will snap it up!