Fuel Water Separator FF031 for Cummins X15 / ISX15 (EPA2013-2021): K37-1021

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The Steinberg FF031 is a fuel water separator element engineered for Cummins X15 and ISX15 engines (EPA2013–2021) in Kenworth and Peterbilt trucks. It removes free and emulsified w ater along with fine particulate contamination from diesel fuel before it reaches the high-pressure common rail injection system. Note: this filter is designed for the Next Generation modular fuel system housing — verify your engine type before ordering. Direct replacement for PACCAR OEM part K37-1021. Includes matching seals. Replace every 15,000 miles or at each PM service interval. Show more