Driving Innovation In Diesel Performance

Fuel Pumps. Built for Reliability.

Find diesel fuel pumps for Cummins, Duramax, and Power Stroke applications. Narrow by brand, year range, and pump size to get to the right CP3 or CP4.2 option for your truck.

Cummins diesel fuel pumps

Cummins Fuel Pumps

Find the right Cummins fuel pump by engine generation and fuel demand. This section covers 5.9 common rail, early 6.7, late 6.7, and 2019+ 6.7 applications.

Improved Stock
2019+ 6.7 Cummins Exergy Improved Stock CP4.2 Pumps - E04 20904

Improved Stock CP4.2

A replacement-focused fuel pump for 2019+ 6.7 Cummins trucks that need dependable stock-style fuel delivery in a daily-driven or work-truck application.

  • Replacement-focused CP4.2 option
  • Designed for 2019+ 6.7 Cummins trucks
  • Good fit for stock or lightly modified use
  • Strong starting point when replacing a failed factory pump
Shop Improved Stock
Sportsman CP3
2013-2018 Late 6.7 Cummins Exergy Sportsman CP3 Pump (6.7C Based) - E04 20405

Sportsman CP3

A strong choice for daily driven, towing, and mild performance Cummins builds that need more fuel volume than a stock pump without moving into a large stroker CP3.

  • Excellent for towing and street-driven trucks
  • Supports stock to 650+ HP style combinations
  • Good upgrade over a worn factory pump
  • Available for 5.9 and 6.7 Cummins applications
Choose your generation
Shop Sportsman CP3
10mm Stroker
2013-2018 Late 6.7 Cummins Exergy 10mm Stroker CP3 Pump (6.7C Based) - E04 20406

10mm Stroker CP3

A step up for 5.9 and 6.7 Cummins trucks that need more fuel than a Sportsman pump can provide while still keeping good street manners in the right setup.

  • More fuel volume than Sportsman CP3
  • Great fit for stronger street and tow builds
  • Good middle ground before moving to 12mm
  • Works best with supporting injectors and tuning
Choose your generation
Shop 10mm Stroker
12mm Stroker
2013-2018 Late 6.7 Cummins Exergy 12mm Stroker CP3 Pump (6.7C Based) - E04 20407

12mm Stroker CP3

Built for serious Cummins horsepower combinations where a larger single CP3 is needed to support bigger injectors, more airflow, and higher fuel demand.

  • Supports 1000+ HP style combinations
  • High-capacity single-pump layout
  • Strong choice for aggressive street and strip builds
  • Needs the right air system, injectors, and tuning
Choose your generation
Shop 12mm Stroker
14mm Race Series
2013-2018 Late 6.7 Cummins Exergy 14mm Stroker CP3 Pump - Race Series (6.7C Based) - E04 20409

14mm Race Series CP3

A race-focused CP3 for high-horsepower Cummins builds where maximum single-pump fuel supply is the priority and the rest of the fuel system is built to match.

  • Maximum single-pump fuel supply
  • Built for 1200–1500+ HP style combinations
  • Best for competition and max-effort builds
  • Requires substantial supporting modifications
Choose your generation
Shop 14mm Race Series
Duramax diesel fuel pumps

Duramax Fuel Pumps

Choose the right Duramax fuel pump by engine code and power level, including LB7, LLY, LBZ, LMM, LML, and L5P applications.

Improved Stock
2011-2016 LML Duramax Exergy Improved Stock CP4.2 Pump - E04 10504

Improved Stock CP4.2

A stock-style replacement fuel pump for LML Duramax trucks that need dependable daily-driver fuel delivery without stepping into a larger performance pump.

  • Replacement-focused LML fuel pump option
  • Good fit for stock and lightly modified trucks
  • Designed for clean replacement installs
  • Solid starting point before larger pump upgrades
Shop Improved Stock
Sportsman CP3
2017+ L5P Duramax Exergy Sportsman CP3 Pump (LBZ Based) - E04 10705

Sportsman CP3

A popular replacement and mild-upgrade CP3 for Duramax trucks that need stronger fuel delivery for towing, street performance, or a reliable stock-plus setup.

  • Excellent replacement and mild-upgrade option
  • Supports stock to 650+ HP style setups
  • Strong fit for towing and street trucks
  • Available across multiple Duramax generations
Choose your generation
Shop Sportsman CP3
10mm Stroker
2017+ L5P Duramax Exergy 10mm Stroker CP3 Pump (LBZ Based) - E04 10706

10mm Stroker CP3

A stronger single-pump upgrade for Duramax builds that need more fuel than a Sportsman can deliver without jumping straight into larger 12mm or 14mm options.

  • More fuel volume than Sportsman CP3
  • Good fit for stronger street and tow builds
  • Solid bridge between mild and serious fueling
  • Pairs best with matching injectors and tuning
Choose your generation
Shop 10mm Stroker
12mm Stroker
2017+ L5P Duramax Exergy 12mm Stroker CP3 Pump (LBZ Based) - E04 10707

12mm Stroker CP3

Built for serious Duramax fuel demand when a larger single CP3 is needed to support more injector, more air, and more horsepower.

  • Supports 1000+ HP style combinations
  • High-capacity single-pump design
  • Strong choice for aggressive street and strip builds
  • Needs the right injectors, airflow, and calibration
Choose your generation
Shop 12mm Stroker
14mm Race Series
2017+ L5P Duramax Exergy 14mm Stroker CP3 Pump - Race Series (LBZ Based) - E04 10709

14mm Race Series CP3

A race-oriented Duramax CP3 for high-horsepower builds that need the highest single-pump fuel supply in this lineup and the rest of the fuel system to match.

  • Maximum single-pump fuel supply
  • Built for 1200–1350+ HP style combinations
  • Best for max-effort race and competition builds
  • Requires major supporting modifications
Choose your generation
Shop 14mm Race Series
Power Stroke diesel fuel pumps

Power Stroke Fuel Pumps

For 2011–2019 6.7 Power Stroke applications, this section separates replacement-focused CP4.2 options from larger stroker pump upgrades.

Improved Stock
2011-2019 6.7 Power Stroke Exergy Improved Stock CP4.2 Pump - E04 40104

Improved Stock CP4.2

A replacement-focused fuel pump for 2011–2019 6.7 Power Stroke trucks that need dependable stock-style performance in a work or daily-driver application.

  • Replacement-style CP4.2 option
  • Designed for 2011–2019 6.7 Power Stroke
  • Good fit for stock and lightly modified trucks
  • Strong starting point before larger fueling upgrades
Shop Improved Stock
10mm Stroker
2011-2019 6.7 Power Stroke Exergy 10mm Stroker CP4.2 Pump - E04 40106

10mm Stroker CP4.2

A stronger 6.7 Power Stroke fuel pump for builds that need more fuel supply than a stock-style pump can support, especially in higher horsepower applications.

  • Supports 900+ HP style combinations
  • More fuel supply than stock-style CP4.2
  • Good fit for stronger street and performance builds
  • Needs the right injectors, airflow, and tuning
Shop 10mm Stroker
Knowledge Hub

Everything you need to know about D&J diesel fuel pumps

D&J fuel pumps are grouped by brand first because Cummins, Duramax, and Power Stroke trucks each have different year ranges, pump styles, and upgrade paths. From replacement-minded CP4.2 options to Sportsman, 10mm, 12mm, and 14mm CP3 upgrades, the right pump depends on fuel demand, injector size, airflow, and how the truck is used.

  • Fuel pumps grouped by engine familyCummins, Duramax, and Power Stroke each have different pump options, year ranges, and upgrade paths. Breaking the page out by brand makes it easier to find the right fit without sorting through a mixed product grid.
  • Choose the smallest pump that fits the buildA larger fuel pump is not automatically better. The right choice depends on injector size, airflow, intended horsepower, towing use, and how the truck is tuned.
  • CP3 and CP4.2 options serve different needsImproved Stock pumps are geared toward replacement-minded fuel delivery, while Sportsman, 10mm, 12mm, and 14mm options step up in fuel volume for trucks that need more pump.
  • Supporting parts still matterFuel injectors, turbocharger size, calibration, filtration, and the rest of the fuel system all play a role in how well a pump performs on the street, on the dyno, or under heavy load.

FAQs

How do I choose the right diesel fuel pump for my truck?
Start with your engine family and year range first, then match the pump to the truck’s intended use. A daily-driven tow rig usually needs a different fuel pump than a high-horsepower street or race build.
What is the difference between an Improved Stock pump and a Sportsman CP3?
An Improved Stock pump is geared toward stock-style replacement use, while a Sportsman CP3 is a common next step for trucks that need stronger fuel delivery for towing, street performance, or moderate horsepower upgrades.
When should I move from a Sportsman pump to a 10mm or 12mm stroker pump?
Move up when the combination needs more fuel than a Sportsman can comfortably support. Injector size, turbo size, target horsepower, and how the truck is tuned all matter when deciding between 10mm and 12mm.
Is a 14mm Race Series pump only for competition builds?
A 14mm pump is aimed at very aggressive builds where maximum single-pump fuel supply is the goal. It makes the most sense when the rest of the fuel system, airflow, and calibration are already built around that level of demand.
Do Cummins, Duramax, and Power Stroke fuel pumps use the same upgrade path?
No. Each engine family has different pump options, year ranges, and application details. That is why the page is separated by brand first and then by generation and pump size.
Can a larger fuel pump help with towing performance?
It can, but only when the truck truly needs more fuel supply. Many towing trucks are better served by a quality replacement pump or a Sportsman-level upgrade rather than jumping straight to a large stroker pump.
Do I need injectors and tuning to match a bigger diesel fuel pump?
Yes. Fuel pump size should be matched to injector size, airflow, and calibration. A mismatched fuel system can hurt drivability, increase smoke, and make the truck harder to tune cleanly.
What should I confirm before ordering a CP3 or CP4.2 pump?
Confirm the brand, engine year range, intended horsepower, and overall fuel system combination. It is also smart to verify injector size, turbocharger setup, and whether the truck is primarily street-driven, work-focused, or built for competition.

*Fuel system requirements vary by generation, injectors, turbo size, tuning, and intended use.