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Back in the olden days cars had to have 5 mph impact bumpers, which had sort of a shock absorber built into the mounts, but that rule never applied to trucks.

So if I worked at a firm that did FEA validation on the bumpers, does that make me olden? <img src="/forums/images/graemlins/pfft.gif" alt="" />

Trivia for the day -- the best such shocks are still in use in some cars, though most OEMs have gone to a foam or crush-cell design in front of the bumper beam all covered by tupperware. PGM (polygel mitigator) bumper shocks are single-stroke shocks that do a great job of absorbing impact.

FWIW, for off-highway use, I'd rather have a frame-mounted bumper.

Randii