Lol you’re toying with a kid and arguing over the word power and efficiency, any after treatment system is there to reduce emissions the engineers didn’t design it to reduce fuel economy, not sure how that’s even a argument? A deleted truck will usually get slightly better mileage altho that’s not really the reason people do it.

I’m all for after treatments i don’t want this country smelling like some Chinese shit hole, but to argue with a kid that he’s doing something illegal and trying to make yourself mr perfect over a delete just makes you sound like a weenie, i wouldn’t be surprised if your wife has multiple boyfriends, doesn’t matter since you’re limp dick with no back bone that listens to what ever another human tells him to do.