SB turbo headers?

321 has an above average amount of titanium alloyed into it. Since Ti likes to turn brown/purple with heat, I'm going to guess that's why you're seeing the pretty colors!
Yeah the colors are not a deal breaker for me. It was just the fact they didn’t suite my needs position wise. I went with a more up and forward style that are 1 3/4 instead of the 1 5/8 these are. But they do have 3/8 flanges. Worth the money hands down on a budget. $1300 won’t touch a pair of stainless headers even on a damn Chevy so that’s a clear answer. Stainlessheaders.com will send you out a pvc kit to have your own custom pair built but they quoted me over 1700 for stainless. Probably worth it not to me. I just bought their flanges and stubs and tig’d a pair of prebuilt 1 3/4 Chevy ones from CX racing for a 78 camaro. Got to pick your battles in the turbo game. Quick way to drop another 7k