repete
.338 Win Mag
I'm not alone!!!My wife has a 2018 Outback 2.5 Limited and aside from it sounding like a diesel for the first few seconds after starting it up, there are no weird or loud noises coming from anywhere. I also have a few Subarus, a 2013 Legacy 3.6, a 2011 WRX and a 2018 STI. Except for the STI that I installed a high volume fuel pump, none of them make any loud noises that come from the fuel system.
You should definitely take it to the dealer to have them look at it.