O.S. Engine OS4A404160 is a low-profile 0.2T head gasket intended for O.S. nitro RC engines compatible with GGT10-series gaskets. It helps engine builders fine-tune combustion volume and secure the seal between the head and liner.
Installation notes: ensure mating faces are clean and flat, inspect for any distortion, and fit a new gasket whenever you strip head hardware or notice sealing decline. Small variations in gasket thickness will alter compression and can affect starting and throttle feel.
Tuning role: the 0.2T option targets precise compression trimming where a minimal reduction in combustion volume is desired, assisting with starting and throttle response without changing major engine components.
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