Oh OK thanks for the info, I'd like to know what that product is in case my new pipes do it. So far, so good though.

So why do you think the mfg. said what he said to me about the lack of tune?

 

Only 2 reasons I can think of, to sell a tune, or he doesn't understand heat and stainless.
The exhaust temps are certainly hot enough to discolor metal.

 

Thanks Rich,
Your grasp of all this and ability to substantiate it all never ceases to amaze me. It's people like you who know what they are talking about and then willing to share what they know with those of us who don't... are some of the main reasons I come to this forum so often. I've learned a lot... so far just enough to make me dangerous though, lol.

The science of it all is becoming more and more interesting to me as I go along. Thanks bud.

 

I have read so many different theories on different forums, I just like to do my own research. I have read guys that think yellow means running rich, running lean, just right...Opinions run the gamut, the facts are easy enough to find and understand.

Exhaust gases probably run upwards of 1200 F as they are expelled, takes a lot to heat metal to over 700 F which is what the reading I posted above show. I believe those were from an AI mag article, but not sure, they ran some independent tests, and I tend to trust the independent stuff from AI.