What caused this damage

its pretty hard to say what caused it,but i would be worried running stock rods on a blown build,can you post any pictures of the damage? i might not know much about what went wrong from them but some others on this site has very sharp eyes!

what company built this? if you dont want to put it out here you could send me a PM about it,i have a feeling who it might be.

and of course welcome to the site!