cocktail shakers = vibration dampeners, ea 25Lbs, one in ea corner of F body convertibles....oil filled with a spring mounted steel weight inside.... 'some' cars had vibrations, all got them installed, many are removed to loose weight ..many cars have no impact from them being removed... yesterday I saw two cars in our group that only had two..one car was missing the fronts, one was missing the rears, and neither had and vibration problem...IF you dont have a problem ,why add in 100Lbs? unless it s just for concourse correct...my car has all 4 , and I dont intend t take them out to check and see...
