ride is to low and hit a speed bump bottom of the headers under the o2 senor the 2 lower pipping are bent in most they could be bent i think looks like a U shape wondering if they will be fine or i should replace them

 

It'll hurt performance (how much depends on the size of the dent) but will still function as a header. Up to you whether it's worth doing anything about, although if CARB is not a concern you can do much better for the price than DC nowadays.

 

Might mess with the flow a little depending how much you dented/crushed it. I wouldnt think it would be too serious to get new headers.

 

, it shouldn't be that bad. Invest in a skid plate to prevent further damage.