Can running LT's with stock exhaust blow a header gasket continuosly?

 

pretty sure it would not matter if you had stock exhaust, but if the LTs are scraping a lot or bottoming out then it can...

 

I kinda doubt the stock exhaust is causing the leaks. I would look towards poor fitting headers or bolts coming loose or not torqued to begin with. Or possibly the headers bottoming out as previously mentioned.