The crafted dread guard shell does not come with a set bonus, nor does it come with mods. If you had a 63 armoring from dread guard gear (not a crafted one) or if you had a 61 armoring (from either campaign gear or straight from the vendor) you could put it in and have the set bonus, but the shell itself doesn't contain a set bonus or mods. Purely for looks
Speaking of that, does anyone happen to know which boss of TfB HM drops the chest? Or does it drop in NiM EC?