Guys have you ever seen this before. This is a pipe that I have had and run since 2007. I was testing an new build on Sunday and pulled the pipe and engine after the runs and saw this "witness line" then noticed these dimples that appear to have been oozing oil. Theyare pushed from the inside out and look almost like when you bottom a screw out onto aluminum but reversed? I am guessing the pipe is tired any thoughts ? Thanks Tony J

Pipe is corroding from the inside out. Aluminum will blister like that.
Jimmy

Time for a new one Tony.

Yup. Get the wallet out Tony

LOOKS LIKE ANOTHER QUALITY PIPE MADE BY ACE ENGINEERING..

LOOKS LIKE HIS QUALITY IS COMING TO THE SURFACE... LOL