O.S. Engine OS45526032 Exhaust Header Pipe Nut M14 for FS120SE FS120SIII FS155P  [OS45526032]

M14 exhaust header nut for FS120 series

This M14 exhaust header pipe nut is an RC-scale accessory designed to secure the junction between an exhaust header and muffler on O.S. Engine FS120-series nitro engines. The part focuses on a simple mechanical role: clamp and seal the header joint to reduce exhaust leakage and maintain stable backpressure during tuning.

Installation is straightforward for hobby workshops: hand-thread the nut onto the header stub, align the pipe for correct fit, then tighten progressively to avoid cross-threading. Use standard RC workshop practices for torque and thread engagement, and check for exhaust leaks after initial run-in. This description treats the component strictly as an RC accessory for model engines and does not imply any real-vehicle use.

Compatibility is limited to the models listed by the manufacturer: FS120SE, FS120SIII, and FS155P. Confirm fitment against your engine header thread and header stub before final installation.