Exhaust line corrosion

A little additional info for the previous post- exhaust line cleaning.

Due to overlook every exhaust line condition timely, this line was fully choke until contaminated out from the tube and corroded.

As you can see from the picture below, the yellow by-product was fully choke out the line. The remaining 1/8 space is super dupe weak for by-product to pass through.

The corroded line unable to reuse anymore, but to make another new one for replacement. All the tube material also corroded until peeled off.

The aftermath line was installed back , the shining reminds others there is the newly fabricated line.