Hot Rods Bolt on brake silencer wishbones help

Hey guys these are on my 32 Ford unsplit wishbones it says brake silencer on them. Looks like it bolts onto the wishbone anyone ever see these

 

Never seen any in over 40 years of hot rodding.

 

Me either, they are cool for whatever reason.

 

A rubber insulator to prevent noise/vibration from traveling up the wishbones into the frame? Hmm

 

My guess is it’s some sort of m*** damper.