Associate editor Emmet White spent the day with @BMWUSA and @michelinusa testing out some of their new M cars on track. The track day @monticellomotorclub included an M2 autocross competition followed up by BMW instructor-led hot laps in M3s and M4s. A drag racing experience behind the wheel of BMW's XM SUV wrapped the day. What is your favorite M car? #bmw #mcar #trackday #carsofinstagram #roadandtrack