Got my new heads but...

Wondering what might have happened here, filler rod but filling what? Same head also has a helicoil installed but I guess I should expect that or maybe not. Heres the sales pitch on the opening page...........These heads are reconditioned and come assembled with a “like new” appearance and quality, with all new Aeromaxx parts installed and a milled deck surface. These heads have outstanding features that include premium one-piece, stainless steel high-flow valves, heat treated and machined steel retainers and valve locks, seals, bronze wall valve guides, 3 angle valve job, and heavy duty valve springs. All heads listed accept their respective stock equipment (i.e. intake manifolds, exhaust headers and manifolds, valve train, valve covers, and accessory bolt holes) Must state cam lift when ordering head assemblies.

Like new??? Does that mean repaired imperfections??

Not trying to be a jerk just like some opinions on what the heck that might be filling?

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