This box sounds awesome. I have mine in a 2018 Silverado with a 2.5" seat lift.
Im running 2 Sundown Sa V2 12's in it with an Apocalypse AAB 4900. Its loud as f***. I replaced the terminal cups with some beefier ones by sound mekanix due to the amount of power Im putting into it and used T-nuts to secure my subs. In my opinion , unless you are gonna have a custom box built and spend $$$ or remove your back seat this is the way to go if you want massive amounts of bass in a crew cab truck. Im very happy with it.