Great pics, Do you have one of the headers and the oil filter?

Looked at Hookers on the Holley site. Checked out the Competition and super comps.
Comps have 16 gauge 1-5/8" tubes 26" long and a 5/16" flange with 8" collector, bolts and gaskets, no reducers, ceramic coated for $625.
Super comps have the same 5/16" flange with larger 1-3/4" tubes 28" long but only 18 gauge. Larger ID than 16 gauge but thinner wall. 10" collector, no reducer, bolts and gaskets, ceramic coated for $855.

I checked out the Dougs D569 on the Butler site.
They have a thicker flange than the Hookers, 3/8". Tubes are 1-3/4" like the super comps but thicker 16 gauge steel. Doesn't say how long the collector of tubes are. Comes with gaskets, bolts and reducers, ceramic coated for $814.
Butler says a 90 degree Oil filter housing is needed.