An internal combustion engine, which includes a cylinder block, a cylinder head fastened to the cylinder block, an aperture formed in a side of the cylinder head, and a conduit assembly, such as an intake runner assembly or an exhaust conduit assembly. A combustion chamber is formed by the cylinder block and the cylinder head. The intake runner assembly is received within the aperture and configured to communicate air to the combustion chamber. The intake runner assembly includes a first piece and a second piece. The first piece has a first channel that includes a bend. The second piece has a second channel that includes another bend mirroring the bend of the first channel. The first piece is coupled to the second piece such that the first and second channels together form a flow path through the intake runner assembly, and the bends of the first and second channels together form a smooth turn in the flow path.