Does anyone have any idea what this noise is after shutting down the engine?
https://drive.google.com/open?id=1KPwGWjp81fdmzNr9WL-5cHLx7AzYOMdz
The only mods are FPP Power Pack II (throttle body, CAI, and tune) and an H pipe. This issue started a few thousand miles after the power pack was...