SB turbo headers?

I started with those and they will do. Not sure how stainless they are as mine were purple in about 2 minutes. They are Chinese and they look they they use the same side pipes on both side. Just saying the drivers side faces up and passengers points down. But for 224 they will work.

that’s purple without the twins attached, just open to the turndowns I added.
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!