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

Exhaust sealing nut for tuning and performance

This M14 exhaust header pipe nut is an accessory intended to secure the join between header and muffler on O.S. Engine FS120-series nitro units. Its primary function is mechanical: clamp and seal the joint to lower leakage and help preserve backpressure stability for consistent engine response.

For workshop fitting: begin by hand-threading the nut onto the header stub, align the pipe for correct positioning, then tighten gradually to avoid cross-threading. Use standard RC torque practice and verify the thread engagement; inspect for exhaust leaks after the initial run-in. This description treats the part solely as a model-engine accessory and not for full-size vehicle use.

The part is listed for FS120SE, FS120SIII, and FS155P. Double-check your header thread and stub dimensions to confirm fitment prior to final installation.