This O.S. Engine OS4A404160 head gasket is a 0.2T shim designed for O.S. nitro model engines that use GGT10 gaskets. It offers a thin sealing option for tuners and mechanics adjusting combustion volume and head sealing.
Installation notes: thoroughly clean mating surfaces, inspect head and liner faces for warping, and replace the gasket whenever the head is removed or where sealing shows signs of failure. Treat any change in gasket thickness as a tuning adjustment, because small shifts can influence starting and midrange behaviour.
Tuning role: the 0.2T gasket is aimed at minimal combustion volume reduction to help refine compression and throttle response without replacing major engine parts.
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