Crash box collision damper for motor vehicle

A collision damping arrangement for a motor vehicle for absorbing energy in a collision, comprising a crashbox damper member extending longitudinally along a longitudinal axis between a first aft end and a second distally opposite forward end and longitudinally deformably compressible in response to longitudinal force application, said first end of said crashbox damper member providing a first mounting surface for mounting to said vehicle, said second end of said crashbox damper member providing a second mounting surface for mounting to a bumper-mounting surface of a bumper, said second end of said crashbox damper member having a sequenced pre-collapse surface providing sequential energy absorbing compression such that at application of longitudinal force, longitudinal compression initially occurs at said pre-collapse surface, prior to compression of the remainder of said crashbox damper member, and upon sufficient further longitudinal force, longitudinal compression of said crash box damper member occurs.