This is an RC-scale head gasket set intended for the OS SPEED 12TZ SP2 engine model, supplied by O.S. Engine and identified as OS21531410. The set is designed to restore or replace the sealing surfaces between the cylinder head and crankcase during routine maintenance or rebuilds.
Fit this gasket set when you remove the cylinder head for inspection, to replace worn sealing layers, or while performing tuning work that requires head access. Good gasket condition helps preserve compression and steady combustion in nitro RC engines.
Installation notes: clean mating faces thoroughly, inspect for warpage or damage before fitting new gaskets, and follow the engine manufacturer's torque and assembly sequence for head bolts. If you are unsure about fitment, verify the seller listing or consult technical documents for OS SPEED 12TZ SP2 compatibility.
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