Durability

Aluminum intake manifolds are more durable than plastic ones. They are less likely to crack under pressure or due to temperature changes, making them a more reliable choice in the long run.

Heat Dissipation

Aluminum is a good conductor of heat, which means it can dissipate heat more effectively. This can help to prevent overheating, potentially extending the lifespan of the engine.

Performance

Aluminum intake manifolds can offer better performance. This is because aluminum is denser than plastic, which could potentially allow for a more streamlined flow of air into the engine.

Repairability

If an aluminum intake manifold does become damaged, it's often possible to repair it rather than having to completely replace it.

Resistance to Warping

Aluminum intake manifolds are more resistant to warping under high heat conditions compared to plastic ones.