With such differing experiences, I think it would be prudent to ask, in advance, "If these don't fit properly, for whatever reason, and they are not used or damaged, may I return them for full credit (less shipping, of course)?" If the answer is "no," despite the great experiences of others, I would be inclined to look elsewhere. It is possible that other, more accommodating, dealers buy their exhausts from Armour, who, from the look of it, seem to specialize in exhausts. If you must pay a reasonable amount more for the peace of mind that you will not be throwing money away on something that doesn't fit, that seems a good idea.
This above, all coming from someone who bought a non-fitting set of pipes elsewhere and did not follow his own obviously guru-like sage
advice offered herein.
Richard L.