my Ferguson tractor has the same thing except mine is two halfs and 2 bolts i broke one the one time and my tractor mechanic in town had a heck of a time finding me another one the circle halfs are made of such crappy metal that after they get heated up and cool down so many times that when you take them off or put them back on after you took em off they just break kindofa bit of a pain in the arse but ya ain't sure how the exhaust bolts on to the manifolds on my 304 IH motor have to look into that once
Nate


Link to my photobucket for pics of my vehicles
http://s238.photobucket.com/albums/ff17/OldIronChevy/