Manifold
CTPA-362437R1 Replacement Part to Fit:  Case/IH "For Models: M, SUPER M, SUPER MTA, SUPER W6, W6, 400, 450, MTA W/ GAS ENGINE" Includes Carburetor & Manifold Gaskets & Outlet Pipe  Price:  $163.83  Buyers Club Price:  $147.45