The HITEAGUE is the Titanium hilok used to build the pigs, when Ti fasteners were new and 'exotic', if you reuse them a regular #10 drill will work along with an allen wrench, originally the holes were supposed to be drilled to .1865 and driven into place as they are an interference fit but not important if it ain't gonna fly (wasn't terribly important to a lot of the hippies and bikers who were screwing it together @ Palmdale either).
The tubes should be thermal anti ice ducting from the engines approximately 11th stage, run through an air to air heat exchanger to deice the inlet lip, the mount bolt S/B stainless steel (CRES) as they were consumables and the part I see was the forward mount for the pylon slipper fairing that tied into the engine pylon fairing it should have serrated adjustment plates on both parts, you might find parts 'glued together' by a tan sealant called 2121, we called it 'Babys#it'

because of its color, texture, smell, and the fact that like its namesake, a small drop of it would spread out like diesel on a lake as you tried to clean it up, anyone who ever changed a baby diaper will instantly know what I mean.
The material was just to cut down on side noise particularly if you were standing in line with the LPF or even riding inside the cabin, kind of like hearing a dentists drill from a few doors way. It's most likely just paper honeycomb as KEVLAR would be sort of pale yellow and either loose, fluffy blankets or if molded, would be yellow inside a hard fibreglass coating. I'd pitch it.