[Tigers] Cannon headers?

[Jim]

Hi - I'm hoping someone might have information on on cannon headers.  I
purchased Tiger recently and the previous owner said the headers were "cannon
headers" and somewhat rare.  I've searched and not been able to find any
reference to that name.  The headers have heat  wrap on them and I haven't
wanted to unwrap them to see if there are any markings etc.  Would appreciate
info that anyone might have.

Jim