Steinberg
Fuel Water Separator FF014 for Cummins X15 / ISX15 (EPA2013-2021): K37-1021
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)
$39.99
$54.13−26%
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OEM-grade certified
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Thread Size
M20 x 1.5
Outer Diameter
94mm
Height
248mm
Filter Media
Synthetic (10 micron)
OEM Reference
K37-1021
Cross Reference
K37-1021, FS20207, PF46236, P583177, WF10566
About This Filter
The Steinberg FF014 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.
This element is a direct replacement for PACCAR OEM part K37-1021. Replace every 15,000 miles or at each PM service interval.
Compatible Part Numbers
Fuel Water Separator FF014 for Cummins X15 / ISX15 (EPA2013-2021): K37-1021 (SKU: FF014) 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.