FS-series Intake Manifold OS42569400 FSa-155-P for O.S. Engine  [OS42569400]

Fit and function for FS-series intake routing

This intake manifold is provided as an RC-scale replacement part to mate with O.S. Engine FS-series engine assemblies. It channels air from the carburettor inlet into the crankcase and is intended as a direct-fit option for maintenance or setup revisions, not for use on road vehicles.

Focus is on reliable fit and serviceability: always verify model number OS42569400 before buying, inspect mating surfaces and gasket condition while fitting, and confirm there is sufficient clearance for the carburettor and needle components. Any manifold change will affect airflow and throttle characteristics and should be tuned together with carburettor and exhaust changes.

Practical fitting advice: replace damaged gaskets, align the manifold carefully to the engine flange, and tighten fasteners evenly to avoid misalignment. If in doubt about compatibility with a particular FS-series submodel, check with the vendor or the manufacturer documentation.

This direct-fit intake manifold is intended for FS-series engines where fit and airflow control matter; confirm OS42569400 prior to installation.