Mitsubishi 4G69 engines produced from June 2007 and later have been built according to a new design that eliminates the oil accumulator and its mounting hole.
Replacement cylinder heads follow this new design. When installing a new-style cylinder head on an engine that originally featured an oil accumulator, the accumulator is not required.
Applicable vehicles include 2003-2006 Outlander, 2004-2006 Lancer and Lancer Sportback, 2004-2007 Galant, 2006-2008 Eclipse and 2007-2008 Eclipse Spyder.
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