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The Sinister Diesel windshield washer fluid cap for 2003–2007 Ford Powerstroke 6.0L is a finished engine-bay replacement intended to tidy the reservoir area and match other Sinister accessories. It is shaped to fit the factory filler neck and installs using OEM mounting points, offering an aesthetic upgrade without changing reservoir function or serviceability.
Sinister Diesel 03-07 Ford Powerstroke 6.0L Windshield Washer Fluid Cap
