You can buy an adapter here to increase to a 6 inch diameter fitting but it is not cheap.
Forget that. I cut an opening and attached one of these:You can buy an adapter here to increase to a 6 inch diameter fitting but it is not cheap.
I haven't looked at the Shop Fox, but if that's another option, why not.If you get lucky you can sometimes score the shop fox model on amazon as an open box. They're essentially the same unit but already have the impeller upgrade.
If you pull the 4 inch adapter off aren't you left with a 6 inch inlet? On mine I just attached it with a metal pipe clamp to run to my dust deputy.