I run with the shields on.I am going to replace them(pipes). I got a set off ebay that are in better shape.
It was running to lean.The old dealer only tuned it for wide open.So when I was cruzing around I was lean.My new dealer got ir right.
They don't look that lean. The yellowing is normal on SS, I doubt your new pipes will look that much different after 2000 miles. The bluing looks to only be at the top bends which is normal. Of course the picture may not show it all and I don't know what you AFR looked like on partial throttle
I know I'm not running lean and my headpipes look a lot like yours....