MBRP makes some great quality components. We'll be covering an install of one of their systems in the near future, and look forward to getting our hands on a 2021= F-150 setup.
Sid-
if you’re looking for a 21 F-150 crew cab with the 3.5 eco to test it on, give me a shout. I bought one two months ago. They are hard to come by now.
607-794-4332