Yamaha - Manifold, intake 1 - 6BX-E3641-10-00 Yamaha-F40-2006 which helps prevent loose plugs

which helps prevent loose plugs and the weird glitches that come with mismatched wiring

6DA-13329-00-00 - GASKET

and a tighter connection between throttle and boat response

A: It gives the cooling hose a proper threaded connection point so water can move through the system without leaks

With a part this vital

Yamaha - Manifold, intake 1 - 6BX-E3641-10-00 Yamaha-F40-2006 which helps prevent loose plugs6BX E3641 10 00 MANIFOLD, INTAKE 1 WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings. ca. gov.