There are a lot of myths, malarkey and horse manure out there when it comes to exhaust wrap. The biggest pile is that exhaust wrap destroys your headers. This is a misconception that scares people away from using exhaust wrap to increase performance. When you wrap exhaust headers, more heat stays in the header pipes—which is what you want.
Where the misconception comes into play is with what happens after the wrap is on. There are a multitude of headers out there and therefore a variety of alloys for tube material. Metal alloys have a minimum and maximum temperature rating for what they can withstand. Extreme cold has major effects on metal just like extreme heat does. That’s why aircraft aluminum is designed to withstand extreme cold way more than extreme hea