Not sure about the size of the hole in the jet in the #4 fitting that screws in the valve cover. I believe it is about a 1/8" some people run it with a restriction in them and others just run the #4 fitting as it is with no restriction.

SDG Motorsports
Hellcat Demon and Redeye Supercharger CNC Porting
https://www.sdgmotorsports.com/