One other thing.....
Just looked closely at my work order. My brakes were still "pulsating" after they repleaced the fronts last week so took it back in. Work order says: "road tested car and confirmed brake pulsation. Pad thickness-5mm. Replaced rear brakes and road tested. Found significently less pulsation. Pls note front rotors are starting to warp from excessive heat due to driving profile. Recommend aftermarket oversized brakes more suitable for track use."
They replaced my front brakes last Thursday!! So I drove it from Friday to Monday then had a track evening Monday night which was VERY easy night as track was wet (2.5hrs - approx 4 sessions, around 15 laps each) and my rotors are warping already!?!?!?!? WTF??? 4 days city driving and 1 lapping evening and my $1600 front brakes are going already!!
Certified High Performance Driving Instructor - BMW of North America, Porsche Club of America / Chief In-Vehicle Instructor - Fleet Safety International
Gone but not forgotten: 2008 E92 M3; Eisenmann Race Exhaust / Dinan 3.62 Limited Slip Differential / Dinan Software / Dinan High-Flow Intake / Dinan Camber Plates / Dinan Lowering Springs / Dinan Sway-Bars