i don't know that callaway or lingenfelter, or even slp, count as "factory" packages.
that's like saying that a saleen mustang is a ford product, that ford makes.
it's not.
those models aren't.
again, children, camaro isn't the point of this thread. firebird is.
just b/c these companies can fall under GM's warranty program, and all that fun stuff, that doesn't mean that they're GM products, rolling off of GM assembly lines...
you won't find an SLP/callaway/lingenfelter car on GM's website.
end of story