i am gonna be the odd man out and say leave em, gives the same look as the rims, black and chrome together.
no black, no black! paint!!!!!!!!!! i think black on your bumpers would look cheap, the heads look great! but if you paint the bumpers to match it will lokk like a fx4 and it will be fresh!! but dont take me wrong, i like your truck the way it sits!
I line-Xd my chrome bumpers, rockers, stepbars and fender flares. I think it lOoks much better than chrome.