OTTO Excavator Parts Zx330 6Hk1 Intake Manifold 8943903190 894390-3190 8-94390319-0 For Isuzu OTTO Intake Manifold for ZX330 Excavators: Designed for Isuzu 6HK1 engine, with part numbers 8943903190/894390-3190/8-94390319-0. Optimizes air flow to maintain stable excavator operation.