2 3/16 bore, unmodified castings, and about an hour pf run time on them since new. Set-up with 6a nozzles and a PG150a-1 pump. I don't have the main or secondary bypasses. This set-up was on a restoration dragster that hung on a wall, got changed up to a blower. I haven't got the flow tag for the pump any longer sadly, I could get the pump flowed if need be. Located in Calgary Alberta, shipping costs are buyers responsibility.