Hi. the amp WILL overheat I'd say.
To resolve the heat issues with my amps, albeit I had 3, I had to install 2 12cm CPU fans. One in the left wheel arch to "suck" air from the outside world, and one in the right wheel arch to pull it through. Nice little wind tunnel across the boot now
This is my boot:
I'll admit a little less "stock" than yours!! But you get the idea