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Subaru WRX & STI (1999-2005) Subaru STI EJ207 Nitraded Crankshaft - Subaru WRX 99-05/STI 99-05/Forester 97-02/Liberty 98-06 : 12200AA390

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This is the OEM supplied Nitrided Treated crankshaft from the WRX STi EJ207.

Once again, Subaru is changing things up and they have gone back to the Nitrided treated crank.

The Subaru Part # 12200AA390 which is the Nitride Treated Crank, superseded from the 12200AA240 heat treated.