OTTO Excavator Parts Yc 4Hf1 Exhaust Manifold Gasket 8971464990 897146-4990 8-97146499-0 For Isuzu This product is an OTTO excavator part—an exhaust manifold gasket for the YC 4HF1 Isuzu engine, part number 8971464990. It ensures proper sealing and functionality in the engine system.