Exergy 13 for Cummins: Specs, Fitment, and Power Gains

The Exergy 13-18 Late Dodge Cummins 6.7L 10mm Stroker CP3 Pump (E04-20406) is a performance injection pump for the 2013-2018 Ram 2500 and Ram 3500 equipped with the 6.7L Cummins ISB diesel engine. The 2013 model year began the late-generation 6.7L ISB, which runs a 6.7C-type CP3 high-pressure injection pump feeding the common rail fuel system at pressures up to 1800 bar under factory calibration. The stock CP3 on this generation handles the factory power level of 370-385 horsepower without issue, but fuel delivery becomes a limiting factor as injector size and boost increase on performance builds, where the stock pump cannot sustain target rail pressure under the combined demand of larger injectors at full throttle. The Exergy lineup for this engine offers five pump configurations -- Sportsman, 10mm Stroker, 12mm Stroker, 14mm Stroker Race Series, and 550 Alpha Stroker -- covering everything from a high-quality stock replacement to an all-out competition fuel system. This guide covers the complete Exergy Injection Pump Cummins 6.7L late option set, how each tier differs in flow capacity, and which pump matches a given power target on the 2013-2018 6.7L platform.

Specifications: Five Tiers for the 2013-2018 6.7L Cummins CP3

All five Exergy pumps for this application are built on the 6.7C-based CP3 pump body, which fits the 2013-2018 6.7L Cummins CP3 mounting location directly. The five options span from stock-replacement quality to full competition output:

• Sportsman CP3 (E04-20405): Remanufactured and calibrated LBZ CP3 at Exergy's quality standard; no flow increase over the stock CP3; the correct selection when the existing pump has failed or lost performance on a near-stock truck where a reliable replacement is needed without additional fuel system demand
• 10mm Stroker (E04-20406): 10mm oversized stroker piston providing approximately 30 percent more flow than the stock CP3 at equivalent RPM; covers the 500-700 horsepower range where moderately upgraded injectors and increased boost begin to outpace the stock pump's output
• 12mm Stroker (E04-20407): 12mm oversized piston delivering approximately 50 percent more flow than stock; for builds in the 700-900 hp range using larger injectors such as 60 percent over or greater, where the 10mm pump approaches its flow ceiling at peak demand
• 14mm Stroker Race Series (E04-20409): 14mm piston with Exergy's race-oriented internal specification; the highest fixed-displacement stroker option in the 6.7L late lineup; for competition builds at 900 horsepower and above using maximum injector sizing where fuel delivery is the top priority
• 550 Alpha Stroker (E04-20410): Exergy's Alpha series configuration for the 6.7L late platform, designed to support high-demand fuel systems in conjunction with large injectors; suited to builds where sustained rail pressure under extended high-load operation is the primary requirement alongside high-output competition applications

The 2013-2018 model year span covers the Ram 2500/3500 6.7L ISB through the last CP3-equipped generation before the CP4 transition. Confirming the engine generation and CP3 pump body type before ordering is the correct step -- the "late" 6.7L Exergy pumps (E04-204xx series) are specific to the 2013-2018 body style and fuel system configuration, and are distinct from the early 6.7L pumps (E04-203xx, covering 2007.5-2012) which use the same 6.7C pump body but are calibrated for the earlier engine's fuel system parameters.

Top Picks: Exergy Injection Pump Cummins 6.7L Late Options

For 2013-2018 6.7L Cummins builds in the 500-700 hp range with moderate injector upgrades, the Exergy 13-18 Late Dodge Cummins 6.7L 10mm Stroker CP3 Pump (E04-20406) is the standard mid-level performance pump and the most commonly selected option for this power range. Builds in the 700-900 hp range with 60 percent or larger injectors should step to the Exergy 13-18 Late Dodge Cummins 6.7L 12mm Stroker CP3 Pump (E04-20407) for the additional flow capacity the larger injectors demand. Competition builds above 900 hp use the Exergy 13-18 Late Dodge Cummins 6.7L 14mm Stroker CP3 Pump Race Series (E04-20409) for maximum fixed-displacement output in the 6.7L late lineup. Browse the full Exergy CP3 injection pump catalog for all Cummins and Duramax pump options.

Match to the Build

• 2013-2018 6.7L Ram with 30-50 percent over injectors and a single or compound turbo targeting 500-700 hp: The 10mm Stroker (E04-20406) covers this range; moderate injector upgrades in the 30-50 percent over class increase fuel flow demand proportionally, and the stock CP3 drops rail pressure progressively at wide-open throttle as the injector demand exceeds the pump's output; the 10mm stroker's approximately 30 percent flow increase sustains rail pressure through the demand at this injector and power level
• High-output 6.7L ISB build with 60+ percent over injectors or larger targeting 700-900 hp: The 12mm Stroker (E04-20407) is the appropriate step when the build uses injectors significantly larger than the 10mm pump can feed at peak demand; at 60 percent over and above, injector fuel flow at full duty cycle exceeds the 10mm pump's comfortable ceiling, causing rail pressure to fall below target at maximum output; the 12mm's approximately 50 percent flow increase over stock maintains rail pressure at the fuel demand of this injector class
• Competition 6.7L Cummins build above 900 hp with maximum injector sizing: The 14mm Race Series (E04-20409) covers builds at the upper end of the 6.7L platform's output where fuel delivery is maximized; competition sled pull, drag truck, and dyno builds running the largest available injectors for the ISB 6.7 platform use the 14mm pump to ensure the fuel system is not the output-limiting constraint at maximum RPM and boost
• Near-stock 2013-2018 6.7L with a failed or worn CP3 needing a quality replacement: The Sportsman (E04-20405) provides a remanufactured CP3 at Exergy's quality standard for trucks where the power level does not require a flow increase; a failed pump on a lightly tuned or stock truck does not benefit from a stroker piston if the injectors and tune are not calibrated to use the additional fuel flow; the Sportsman replacement restores correct rail pressure without changing the fuel delivery character of the stock system

Signs the 6.7L Cummins CP3 Is Failing

• P0087 or P0088 rail pressure fault codes -- the ECM detecting actual rail pressure outside the commanded target range under operating conditions; low rail pressure codes during acceleration confirm the CP3 cannot keep up with injector demand, while high rail pressure codes can indicate a stuck or failing pressure relief valve; either condition warrants CP3 inspection before continued high-load operation
• Progressive rail pressure drop during a wide-open throttle run on a data logger -- rail pressure holding at target at idle and light throttle but dropping below the fuel map's commanded pressure as RPM and injector pulse width increase at full load; the gap between commanded and actual rail pressure at peak RPM quantifies how much additional CP3 flow the build requires and guides pump tier selection
• Extended cranking before the engine catches when starting cold -- a worn CP3 that cannot build adequate rail pressure at cranking RPM before fuel delivery to the injectors begins; the common rail system requires a minimum pressure before injector events will fire successfully; a pump with degraded volumetric efficiency delays this pressure buildup and extends crank time
• Smoke at high load inconsistent with fueling calibration -- incomplete combustion from poor fuel atomization caused by low rail pressure; the common rail injector depends on high injection pressure to atomize fuel into fine droplets for efficient combustion; when CP3 output drops, the injection pressure at the tip decreases and droplet size increases, producing visible smoke and reduced power output even when the tune is correct

Frequently Asked Questions

What injector size matches each Exergy pump tier on the 2013-2018 6.7L Cummins?

As a general guideline: the Sportsman pairs with stock or lightly tuned injectors up to approximately 30 percent over; the 10mm Stroker covers injectors from stock to approximately 50-60 percent over; the 12mm Stroker supports injectors in the 60-100 percent over range; the 14mm Race Series is paired with the largest available injectors for maximum output builds. These are guidelines based on typical fuel system balance -- the actual match depends on the specific injector flow rate at operating pulse width, the boost level, and the tune's fuel delivery targets. Confirming the injector sizing against the Exergy Injection Pump Cummins flow spec for the selected pump tier is the correct step before ordering.

Bottom Line

The Exergy 2013-2018 6.7L Cummins CP3 lineup covers five performance tiers from the Sportsman through the 14mm Race Series, fitting every 2013-2018 Ram 2500/3500 6.7L ISB Cummins directly on the factory CP3 mount. Match the pump tier to the injector size and power target: 10mm for 500-700 hp, 12mm for 700-900 hp, and 14mm for competition builds above 900 hp.