I won't buy that one Carl. To many other bolts restricting the movement.
My guess is that it was an aid in the assembly. The line
worker used the pins as a guide when installing the manifolds.
I've really never seen much of a problem with not having the
ends bolted down. Now blowing out the gasket at the bottom
flange where the cobs come out....that's another story. I'm
replacing the exhaust pipe flange gasket about every few months.
Oh yeah, our new guy isn't using the stock manifolds, remember?
He's installing Williams headers and a Clifford 4 barrel
intake, taint connected together.
dg