Shaking at high speed when braking

Hello, even though you have changed all these parts, especially the brake rotors, vibration can occur because brake rotors out of the box could be out of round. Depends on the quality of the parts and how they were stored since they were manufactured. I would check for rotor runout before anything else. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops