Full boltons!!
'00 Formula A4, 3.23's, Lid, cold-air, cat-back

I consider a bolt-on to be anything that bolts onto the engine and doesn't touch oil.
IIRC, any form of non-stock rockers are excluded from the bolt-on list.
So pretty much anything that would exclude you from getting on the Stock-Internal list is not a bolt-on.
The Best V8 Stories One Small Block at Time


Yeah I saw that too, gotta be a joke right?