Misc I/C guestions

[bruce]

What size is the neck on a Duttweiler large neck I/C?
What size threads are used to hold the I/C scoop to the I/C?.

TIA
Bruce

 

[GS70350]

neck has a 2.5 inch inlet, and is the same size as the current neck a little ways after the bend, so it welds right up. i dont know what size the screws are, i just go and get some small sheetmetal screws from wal mart and thread em in there. even if they are kinda loose, once you have all of em, they wont come out.