This is a NEW Pipe Adapter for New style Exhaust manifolds used on IH tractors with 6 cylinder gas motors C221, C263,.It will fit IH gas tractors 460 560 606 656 660 . Without this adapter it will be necessary to cut the hole larger in the hood because the new manifolds have a larger exhaust hole than the original C221 and C263 had. I have New manifolds listed . Email if you if you are not sure if this will fit your tractor. Check out my for other IH tractor parts. This item will be drop shipped direct from the manufacturer in the lower 48 states .