Generally speaking, the more streamlined the shape of the intake manifold, the better the air flow performance. For cars, due to limited space, the intake manifold needs to be designed to be more compact to better fit the overall structure of the vehicle.

Finally, size is also an important factor to consider when choosing an intake manifold. The size of the intake manifold needs to be determined according to the displacement and power of the Toyota Engine.

Bare Engine with large displacement require larger intake manifolds to provide more oxygen supply. Bare Engine with higher power require larger intake manifolds to provide a larger intake volume to ensure combustion efficiency and power output.

In summary, choosing a suitable intake manifold requires considering factors such as material, shape and size. Only by choosing a suitable intake manifold can the normal operation and excellent performance of Bare Engine be ensured.