Yamaha - Manifold, intake 1 - 6BX-E3641-10-94Yamaha Manifold, Intake 1 6BX E3641 10 94 Ensure Proper Airflow and Engine Performance with Genuine Yamaha Intake Components The Yamaha Manifold, intake 1 6BX E3641 10 94 is an OEM intake manifold engineered to direct air efficiently into the combustion chamber of your Yamaha outboard engine. This component plays a critical role in engine performance by ensuring a balanced air fuel mixture, which contributes to smooth operation and fuel efficiency.