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  1. turboblake

    600hp OBS 7.3 oil filler setup

    I recently bought a 1996 7.3l with a lot of upgrades done and instead of the oil cap on the valve cover, it has galvanized pipe running up out of it with a breather hose attached to it. Is there a purpose for doing that when building a performance diesel? New to the forum so thanks for any...

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