Dont know yet regards what they will weigh. They will be relatively heavy though. Stainless internals as well.
I will have them bracket supported in a couple of places and bolted to the chassis.
They will end up being copies of Aussie Mikes setup, basically with interchangeable internals, cats and quiet in one set and no cats and larger diameter in the other set. Rego Vs After Rego
The 4.5 inch was difficult to find and is not polished, 4 or 5 inch polished stainless is everywhere.
Regards
Hogster