It seems every time we catch a glimpse of BMW's upcoming high performance 1 Series, more details are revealed. Up until now, all of the mules and prototypes have had only two exhaust pipes. In contrast, the newest car to get caught on camera now has four pipes. Why is this significant? Because four pipes are one of the characteristic features of all M models.
This four-piped addition seems to indicate that this car will, in fact, earn that coveted M badge. We still don't know exactly what the widebody 1 will be called, of course, and we are leaning toward 1 Series M, something such as 1xx M (as in 140 M) is not out of the question.
If this mystery car is a 1xx M, we would expect the higher output engine to get a designation correspondingly higher than the current top 135 in keeping with BMW's sort-of-power-related naming convention. We still don't know when this car will debut, but sometime during the next auto show season seems probable.