OK, here's the deal flat out.

50 State Legal means it passes CARB/emission requirements. Each state has its own laws about cars and whatnot. In our great "Commonwealth of Virginia" any aftermarket mod is technically illegal.

Silencer doesn't make it any more legal. it just keeps it a little more quiet and makes it less less likely that a cop will hear it. It also will restrict the exhaust airflow (as do most fartcans w/o the silencer).

I got a ticket for my fartcan when I first got my car and when I was a little rice boy. Took pics to court that I had it changed out, but never got a chance to even mention them. The judge was that gay.

I replaced that fartcan by getting 2.25 piping all the way back into a freeflowing "stock-like" muffler with 2.25 inlet and outlet. I personally love that shit. Looks stock and sounds it at low RPMs, then when I get on it just sounds awesome. Might want to try that.