Thanks! I do enjoy the Toyotas.My '15 Sequoia has nothing. I'm probably gonna add this 10mm, foam, sticky back insulation found on ebay: 1.4M 10mm Car Auto Sound Deadener Firewall Hood Heat Barrier Pad Insulation Mat | eBay
To avoid disrupting airflow, I'm sticking to the area only where the hood metal touches the edges of vehicle, you can see where this is on the hood because usually there is a small mark from the rubber around the vehicle edges.
Luck and enjoy those Toyotas. : ^ )))