Had a collison, pushed in the drivers side fender, bumper, broke the grille & also bent the front drivers side corner of what looks to be the frame or underbody? the section that the fenders, grille attach to? between the radiator & grille, whats this part or section called? & can it be replaced? or should it be staightened?

 

Core support.

 

It can be replaced easily enough. You'd actually replace the core support if you were to say, put a 98+ grille and lights on a pre-98 vehicle. You'd probably be better off replacing it than to try straightening it out. Check your local pull and pay yards.

 

its called the nose clip or front end clip,hope that helps you .