Header Question

65TerrorCuda said

Anybody know what those round holes in the flange are for? My spitties don't have them

Or the slotted bolt holes. Looks like an improved version

Click to expand...

The s’mores holes make getting this bolts in easier. That’s why I think it was done.
IMO, *I Think* those holes in the flanges are for placement on a jig to set up the flange for welding the tubes on.