An engine includes a cylinder head, an intake manifold, and a partition wall. The cylinder head includes an intake port communicating with a combustion chamber. The intake manifold is fixed to the cylinder head and includes an intake passage communicating with the intake port. The partition wall that separates at least part of the intake port into a first channel and a second channel. The partition wall includes a partition wall member extending from the intake port to the intake passage and fixed to an inner wall of the intake port and an inner wall of the intake passage.

An engine includes a cylinder head, an intake manifold, and a partition wall. The cylinder head includes an intake port communicating with a combustion chamber. The intake manifold is fixed to the cylinder head and includes an intake passage communicating with the intake port. The partition wall that separates at least part of the intake port into a first channel and a second channel. The partition wall includes a partition wall member extending from the intake port to the intake passage and fixed to an inner wall of the intake port and an inner wall of the intake passage.

Provided is an intake manifold for an internal combustion engine, the intake manifold including an upstream portion, a first downstream portion, and a second downstream portion. The upstream portion includes a first upstream passage and a second upstream passage. The first downstream portion includes a first downstream passage configured to communicate the first upstream passage with an intake port of a first cylinder head. The second downstream portion includes a second downstream passage configured to communicate the second upstream passage with an intake port of a second cylinder head. The upstream portion, the first downstream portion, and the second downstream portion are provided in a separate manner. In the intake manifold, a flange of the first downstream portion is connected to a flange of the upstream portion, and a flange of the second downstream portion is connected to the flange of the upstream portion.

Provided is an intake manifold for an internal combustion engine, the intake manifold including an upstream portion, a first downstream portion, and a second downstream portion. The upstream portion includes a first upstream passage and a second upstream passage. The first downstream portion includes a first downstream passage configured to communicate the first upstream passage with an intake port of a first cylinder head. The second downstream portion includes a second downstream passage configured to communicate the second upstream passage with an intake port of a second cylinder head. The upstream portion, the first downstream portion, and the second downstream portion are provided in a separate manner. In the intake manifold, a flange of the first downstream portion is connected to a flange of the upstream portion, and a flange of the second downstream portion is connected to the flange of the upstream portion.