[CSBM5]

I'll repost my first S55 MPE encounter years ago:

Re S55...way back when the F80 was just out in 2014, I was at a BMWCCA autox event at the Perf Center. I was in the pits attending to my E90 M3, checking pressures, rechecking lug bolt torque, etc, and I heard this wicked sound, braaaatttt, braaaaaaatttt, going on in the background. I didn't actively pay attention to it at first, but my mind was thinking back to my motocross days in the 1970s as I continued to focus on getting the car ready. I was thinking big bore 2-strokes: Maico 501? Yamaha SC500? Penton 400? Suzuki TM400? Good thoughts continued while that wicked sounding engine revving out hard through the gears multiple times continued, memories of racing guys on these back then, getting pelted with dirt and rocks from a friend's Penton 400, etc...about that time the F80 M3 comes into view with Mike Renner just getting on it good, pre-running the course for the day. That brought me back to the present. F80 M3, M-performance exhaust...sounded great to me. It is what it is. Not an S85 or S65 wail but a whole different chorus of crazy tones.

At that same event there was an M6 with a full Meisterschaft exhaust, and the S85 screaming through that system is about the best sounding car I've heard (WOT, high revs, not idling).