In a message dated 7/20/05 12:44:27 AM, phlogiston420@GMAIL.COM writes:

<< i once attempted to remove this . . .tin . . . but after using more
strength than i thought prudent, i was only able to get the bolts out halfway!  of
course i am referring to the bolts which attach the down pipes to the exhaust
manifold and also hold the mounting arms for this plate.  >>

The fasteners could be rubbing hard against the walls of their holes in the
head pipe flange.  Also, they might be hunging up on the engine tin mounting
lugs.  Try loosening both fateners on the head pipe flange, then pry on the
flange up, down, left and right (relative to the head) as you are backing out the
fastener.  You'll know once you find the sweet spot; just don't go animal on
the prying part of this exercise.

George