Guys thanks for posting this video. I have been watching it over and over with my Sennheiser headphones.
BarryB - I really enjoyed watching your hooning. You may want to sign up for Michelin's loyalty program - I'm sure you're going to be their best customer!
What's amazing in the video is that the Sport and Race sound very similar. In fact in the Vimeo video they sound identical because the video doesn't capture the volume difference effectively. I was expecting the Sport to be quieter at low RPMs because of the valve. It seems the pattern is similar though just louder with the Race.
Still not sure which one I will get though - I'm leaning towards Sport 90mm - have to decide by tomorrow.
2014 Porsche 911 Turbo S
2015 Mercedes-Benz C300 Sport 4MATIC