Painted them with dark silver metallic DupliColor wheel paint. I probably wouldn't have done it if I had a real Boss, but I think they look better painted on my GT.
I just did this. I have oxy/acetylene torches, and it was still difficult. I broke both studs off on the driver's side, but it's no problem because the studs are pressed into the cats, so I just heated up the flange and knocked them out with a hammer, then used through bolts when putting it...