Steering Wheel Vibration

I have a 2000 Stratus; all the brakes and their parts are new, rotors, pads, calipers, master cylinder, etc. When braking at speeds higher than 40, the steering wheel still vibrates violently. I'm :banghead: Can someone please tell me what to look at next? Thanks very much.

the knew rotors may not be true to the hub an on car lathe will true the rotor to the hub. may be a bad hub.did you rotae the tirs at the same time if so maybe the tires are out of balance