Friend of mine had his car(not a C7) cam'ed, headers, and tuned by Callaway.
The engine blew up and he spent 3 months fighting with them before they finally accepted responsibility while his car sat in his garage.
It was another 3 months till he got his car back.
For that reason, alone, I'll never have my C7 done by Callaway.
I'll go with Hennessey.
