FS-40 FS-61 FS-80 60 Degree Exhaust Pipe Set for Tuned-Pipe Upgrades - O.S. Engine OS45269000  [OS45269000]

FS series exhaust pipe specifications

This RC-scale exhaust pipe set is made for use with O.S. Engine's FS series models listed. The 60 degree bend geometry is configured to work with the exhaust flow and pulse timing of FS-40, FS-61, and FS-80 engines, helping builders and tuners direct exhaust routing and manage back-pressure without modifying internal engine parts.

The set is supplied as replacement or upgrade parts for existing tuned-pipe assemblies. Fitment depends on FS-series manifold outlet spacing and mounting points, so inspect manifold outlet alignment and gasket seating before final tightening. Standard hand tools are adequate for installation; avoid overtightening flange fasteners to protect sealing surfaces.

When used for tuning, this pipe set is a system component that influences pulse scavenging and midrange response. Expect the need to tweak carburetor needle settings or header length after installation, since exhaust timing and back-pressure characteristics will shift.