Fuel Filter FF031 — Fuel Filter Kit for PACCAR MX-13 (K37-1021 / FS20207) 149
Steinberg

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

SKU: FF031OEM: K37-1021Cross: K37-1021, FS20207, PF46236,...
Confirmed Vehicle Compatibility
Kenworth T660 (Cummins ISX15, 2013-2021)Kenworth T680 (Cummins X15, 2017-2021)
Kenworth T880 (Cummins X15, 2017-2021)Kenworth W900 (Cummins ISX15)Peterbilt 389 (Cummins ISX15)Peterbilt 579 (Cummins X15, 2017-2021)
$28.99
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OEM-grade certified
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Dimensions
Kit — includes multiple filter elements. See product description for individual specs.
Filter Media
Synthetic (10 micron)
OEM Reference
K37-1021
Cross Reference
K37-1021, FS20207, PF46236, P583177, WF10566

About This Filter

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 water 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.

Compatible Part Numbers

Fuel Water Separator FF031 for Cummins X15 / ISX15 (EPA2013-2021): K37-1021 (SKU: FF031) is a direct replacement for the following OEM and aftermarket part numbers:

K37-1021FS20207PF46236P583177WF10566

OEM Reference Number

The OEM reference number for this filter is K37-1021. Use this number to verify fitment with your truck manufacturer's parts catalog.