I have a M3 control arms and tension rods installed less than 1000 miles. I've already been to one track event with those M3 bits and the older brakes. No vibration at that time. It's definitely related to the brakes. I'll try loosing up the rotor retaining screw a bit and re-torquing the wheels.
Equal Opportunity Harasser!
6MT | COBB | AR | AE | Forge DV | HPF | P3 Gauge | Hybrid Intake | O.S.Giken TCD | M3 bits