OTTO Excavator Parts Nkr77 4Jh1 Exhaust Manifold 8972885750 897288-5750 8-97288575-0 For Isuzu Premium exhaust manifold (8972885750) for OTTO Nkr77 & Isuzu 4Jh1. Made of high-heat-resistant cast iron, meets OEM specs. Precise fit, anti-thermal fatigue. Ample stock & fast dispatch—reliable for your client supply.