2006 Porsche Cayman S with Fabspeed race exhaust vs 2007 Yamaha R1 with Akrapovic evolution full titanium race exhaust. They sound almost the same as far as loudness is concerned from the cameras point of view. However, sitting on the R1 is about 5 times louder compared to sitting inside the Cayman S. The Cayman was revved up to 4k rpm. The R1 was revved up to 6k rpm. At idle, the R1 is way louder than the Cayman.
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