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Air and Fuel› Fuel Pumps, Regulators and Components

FASS Fuel Systems

FASS Cummins ISX and X15 2500 3500 Fuel System Filter Duramax DIFSHD4001

$525.26 $499.00 Save $26.26

SKU: F002 DIFSHD4001

In Stock
In Stock
Ships by Jul 3
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

The FASS Drop-In Series Diesel Fuel System is designed for Cummins ISX and X15 engines. This system effectively removes air vapor and entrained air from the diesel fuel, protecting injection systems from premature failure and potentially tripling their lifespan. It also helps to optimize MPG, restore horsepower, and sharpen throttle response. Installation is straightforward and can typically be completed in under an hour with no cutting or additional modifications required.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandFASS Fuel Systems
Part NumberF002 DIFSHD4001

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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