According to the poll, 40% of voters think the MINI WRC has the coolest sounding engine.
I feel obliged to concur and admit I thoroughly enjoy this high pitch, on throttle blasting, spewing from that unusual double exhaust. Not to mention the "machine-gun like" rattle, firing out when the driver comes off the throttle.
Obviously, exhaust sounds have become an important consideration when today's road cars are designed. I am unaware if noise was at all considered by Prodrive in their design of the MINI's exhaust system. Whatever the considerations, the result is effective.