Best of the few laps I did in the day, would have been a low 57 without the traffic. I'm happy with the result. 2nd time ever at Sonoma, but it might as well be my first. Clearly lots to improve on. 

2006 BMW 330i
3300lbs w/Driver
213whp
265/35 Accelera 651 Sport

Current Modifications:
Stock Engine - stock headers, stock airbox
Oil Pan Baffle
Chinese Oil Cooler and N54 Oil Filter housing
APEX VS-5RS 18x10.5 
JRZ RS2 M3 Coilovers (pretty sure they need a rebuild) 
12k swift springs front 14k Rear divorced setup
M3 e90 Brakes w/Hawk DTC60 pads
M3 Rear Subframe
M3 LSD 3.85
Complete M3 Suspension arms front and rear
M3 Knuckles 
Turner Front Thrust arm bearings