Interesting, will think more on this. Heard mostly of complaints in high moisture environments and that’s not much an issue in So Cal. Haven’t heard issues on the heat cracking so soon but makes sense.And that header wrap- it accelerates hot corrosion on the headers... I used it on my head pipe and continued under the drivers seat on my series in Africa and I had exhaust breaks from keeping it too hot.
And the V8 in Mikes 101FC had the headers wrapped (that truck didn’t go to Africa) and they basically dissolved inside the wrap. 304 stainless won’t last much longer... 316, if they even use it, would hold up better.
You may have to remove the wrap.
My wrap stops where the header meats the front pipe so it will dissipate heat at the flange and below. This model header has two below styled connectors to supposedly expand and shrink with heat to prevent cracking. My last exhaust setup (factory) went bad at the front pipe just up from the cat due to a crack and then snapped hanger