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Stock exhaust diameter?

RavenTBK
in 1990 to Present Legacy, Impreza, Outback, Forester, Baja, WRX&WrxSTI, SVX

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2006 Outback 2.5i is what I've got. Anybody know what the stock exhaust pipe diameter is? I'm attempting to locate flanges for my mufflers...with the idea to redo it all from axle back, but retain the ability to re-bolt my stock gear.

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