Brake pulsation can come from multiple things. Using brakes too much (riding the brakes), too hard (waiting till the last minute to brake), and wheels being tightened too much or incorrectly. Your profile says you have wheel spacers. I'd make sure they're tightened correctly. Were your rotors replaced or resurfaced. If resurfaced, have them check thickness and make sure it's not under the discard thickness. Is your vibration shaking the steering wheel or feel like a back and forth pulse. Steering wheel shake = front. Back and forth = rear. Hope thi helps some.