C3 Corvette Urethane Bumper Cover Install
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With the bumper cover and bar removed, there was easy access for replacing the top panel support bracket and the energy-absorbing bolts. The large square die on the bolt is slightly smaller than the bolt shaft diameter. When the bumper bar is forced rearward during an impact, the die is pushed down the shaft stretching and extruding it to safely absorb some of the impact. View Related Article
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