I've noticed this purring sound out of SST I assume when cruising low speed. Sounds kinda like a dove making purr purr purring.... Otherwise she runs great. Just hit 6k miles w only catback. Just wondering if I'm going bonkers or there's a dove hitching a ride in my cabin.... not a joke.

 

Mine sounds the same way...i like it though.

I always thought it sounded more like a spaceship than a dove...damn im a nerd