Inside colour of exhaust manifold?
 

Odd thread title, I know, but I just installed my mid-pipe today and noticed that the inside of my manifold was a very even shade of white. I thought these cars ran on the rich side before tuning, I figured it would have been quite black in there. It's not something I'm concerned about, just something that caught my eye. Even so, is that normal?

Stock tune is leaner, I was seeing 13 AFR under WOT on the OE flash. Thats a normal color.

White is normal. It runs rich, but the exhaust is also really hot, and that fuel still gets burnt ... just in the manifold. :)

Yeah, my manifold is ash white on the inside as well as the O2 sensor when I removed it. Should be fine, Lol.

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Good stuff, thanks guys.