Bendable core unit

1. A bent core unit for a heat exchanger, said core unit comprising:

a pair of headers spaced from one another each defining a fluid space for receiving a fluid therein and each defining a plurality of apertures;

a first region comprising a plurality of first tubes in a parallel relationship and extending between said headers in fluid communication with at least one of said apertures of each of said headers for transferring fluid therebetween and comprising a first fin disposed between adjacent pairs of said first tubes for dissipating heat from said first tubes;

a second region comprising a plurality of second tubes in a parallel relationship and extending between said headers in fluid communication with at least one aperture of each of said headers for transferring fluid therebetween and comprising a second fin disposed between adjacent pairs of said second tubes for dissipating heat from said second tubes; and

a crushable center different than said first and second regions and disposed parallelly between said first and second regions for controllably crushing when said headers are bent;

wherein said crushable center further comprises a third fin having a height greater than a height of said first and second fins; and

wherein said third fin is further defined as formed from a material having a gauge less than said first or second fins.