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Engine Expansion Plug

Part Number: 11021AA020

Plug Cylinder Block.
-9Y. NO.1. NO.3.
Plug that prevents the engine block or cylinder head from cracking in case of freezing coolant. Also used to plug the casting holes from production.

Fits Baja, Forester, Impreza, Legacy, Outback, STI, SVX, WRX

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