Exergy 11 for Power Stroke: Specs, Fitment, and Power Gains

The Exergy Injection Pump Power Stroke lineup for the 6.7L Ford Power Stroke covers two injection pump configurations designed to address the factory CP4.2 pump's limitations on both stock and modified 6.7L Power Stroke builds. The 6.7L Power Stroke (2011-2019 Ford F-250, F-350, F-450, and F-550 Super Duty) uses the Bosch CP4.2 high-pressure injection pump as its primary fuel delivery component in the common rail fuel system. The factory CP4.2 generates rail pressures up to the system's operating limit and handles fuel delivery for the factory injector set without issue at stock output levels, but its design tolerances and lubrication properties create challenges under sustained high-demand operation, higher-output tunes, and the fuel quality variations common in North American diesel supply. Exergy Performance addresses both scenarios: the Exergy 10mm Stroker CP4.2 (E04 40106) increases pump displacement for higher-output builds, while the Improved Stock CP4.2 (E04 40104) improves reliability over the factory pump at stock or mild tune output levels. This guide covers Exergy Injection Pump specs for the 6.7L Power Stroke, which pump fits which build stage, and the signs that indicate the factory CP4.2 is ready for replacement.

Fitment: Exergy CP4.2 Pumps for 2011-2019 Ford 6.7L Power Stroke

Both Exergy 6.7L Power Stroke CP4.2 pump configurations fit the same application range:

• 2011-2019 Ford F-250, F-350, F-450, F-550 Super Duty with 6.7L Power Stroke diesel engine
• Covers both the first-generation 6.7L Power Stroke ("Scorpion," 2011-2016) and the second-generation 6.7L Power Stroke (2017-2019)
• Both pump variants install at the factory CP4.2 mounting location using the factory fuel supply and return connections, drive gear interface, and mounting hardware

The "Scorpion Based" designation in the product name refers to the pump platform: Exergy builds these pumps using the Scorpion-generation 6.7L Power Stroke CP4.2 as the foundation. The Scorpion engine (2011-2016) introduced the CP4.2 to the Power Stroke lineup, and Exergy's pump engineering work was done on this platform. Both the 2011-2016 and 2017-2019 6.7L Power Stroke applications share the same CP4.2 installation, making both Exergy pumps compatible across the full 2011-2019 model year span.

The 10mm Stroker variant increases pump displacement by using a 10mm stroke piston in place of the factory piston. This raises the pump's fuel delivery volume per revolution, allowing it to sustain adequate rail pressure at the higher injection demand a Stage 2 or higher performance tune creates. The Improved Stock variant maintains factory-equivalent displacement but uses improved internal tolerances and material specifications to extend pump service life and reduce the risk of the debris-generating failure mode that has made the factory CP4.2 a known concern on the 6.7L Power Stroke platform.

Top Picks: Exergy CP4.2 Pumps for the 6.7L Power Stroke

The Exergy 11-19 Ford Power Stroke 6.7L 10mm Stroker CP4.2 Pump (Scorpion Based) - Injection Pump (E04 40106) is the performance upgrade option for 6.7L Power Stroke builds running a Stage 2 or higher tune, compound turbocharger setups, or larger injectors that require more fuel delivery volume than the factory pump can sustain at peak injection demand. The 10mm stroker piston raises pump output above the factory CP4.2's delivery volume ceiling, preventing the rail pressure drop that limits injector pulse width and power output on highly modified 6.7L Power Stroke builds. For 6.7L Power Stroke applications at factory output or Stage 1 tune levels where the goal is improved pump durability rather than increased fuel delivery volume, the Exergy 11-19 Ford Power Stroke 6.7L Improved Stock CP4.2 Pump (Scorpion Based) - Injection Pump (E04 40104) is the correct selection. The Improved Stock pump replaces the factory CP4.2 with a unit built to tighter tolerances and with improved internal specifications, reducing the risk of premature failure without changing the displacement characteristics the factory fuel system is calibrated to manage. Browse the complete Exergy injection pump catalog for CP4.2 and CP3 options across Power Stroke, Cummins, and Duramax applications.

Match to the Build

• 2011-2019 6.7L Power Stroke at Stage 2 tune or higher: A Stage 2 performance tune on the 6.7L Power Stroke increases fueling and injection timing beyond Stage 1 levels, raising peak injection demand to a point where the factory CP4.2 can struggle to maintain target rail pressure under sustained wide-open throttle or heavy tow conditions; the 10mm Stroker (E04 40106) addresses this by increasing pump output to match the higher delivery demand the Stage 2 tune creates
• 6.7L Power Stroke with compound turbocharger setup or upgraded injectors: A compound turbo build or a set of larger injectors requires more fuel delivery volume per injection event than the factory CP4.2 is designed to supply; the 10mm Stroker increases the pump's per-revolution output to sustain the rail pressure these high-flow injector setups need at peak demand
• 2011-2019 6.7L Power Stroke replacing a failed factory CP4.2 with debris concern: The factory CP4.2 failure mode on the 6.7L Power Stroke is well-documented -- when the pump fails from lubrication breakdown, it distributes metal particles throughout the entire fuel system, requiring replacement of the pump, fuel rails, injectors, and all fuel lines to prevent secondary failures from contamination; replacing a failing or recently failed factory CP4.2 with the Improved Stock Exergy pump (E04 40104) at a stock tune restores pump function with better reliability than the factory unit
• High-mileage 6.7L Power Stroke as a preventive replacement before failure: The factory CP4.2 on 6.7L Power Stroke trucks with high mileage or extended service intervals is a candidate for proactive replacement before the failure mode occurs; replacing with the Exergy Improved Stock pump on a stock or Stage 1 application before the pump reaches its failure point prevents the full fuel system contamination scenario that a catastrophic in-service failure produces

Signs the 6.7L Power Stroke CP4.2 Needs Replacement

• P0087 fault code (fuel rail pressure too low) -- the most direct indicator of a CP4.2 that is failing to maintain target rail pressure; P0087 on a 6.7L Power Stroke with no fuel supply restriction (clean fuel filter, unrestricted lift pump) points to the high-pressure pump not generating sufficient output; the code may appear intermittently first under high-load conditions before becoming persistent as the pump degrades further
• Extended crank time before start, especially after the truck has sat overnight -- the high-pressure fuel system losing rail pressure faster than normal between key cycles indicates the pump or injectors are not holding pressure; on the 6.7L Power Stroke, a CP4.2 that is worn or beginning to fail produces longer crank times as the system must build pressure from low before the engine fires
• Rough idle or misfires at low RPM on a previously smooth 6.7L Power Stroke -- low rail pressure at idle from a weakening CP4.2 produces inconsistent injection timing and volume across cylinders; the 6.7L Power Stroke is sensitive to rail pressure variation at idle, and a pump that cannot hold consistent pressure at low RPM produces a rough, uneven idle that worsens progressively as pump condition deteriorates
• Reduced power output and black smoke under load -- insufficient rail pressure at peak demand causing the fuel system to limit injection pulse width below the tune's commanded level; the engine receives less fuel than the calibration calls for, producing reduced power and visible smoke from incomplete combustion; on a tuned 6.7L Power Stroke, this symptom often appears first on hot days or after sustained towing when fuel temperature is elevated and pump efficiency is reduced

Frequently Asked Questions

Do I need the 10mm Stroker or the Improved Stock pump for a Stage 1 tune?

For a Stage 1 tune on the 6.7L Power Stroke, the Improved Stock CP4.2 (E04 40104) is typically sufficient. Stage 1 tunes on the 6.7L Power Stroke raise boost and fueling moderately -- within the range the factory CP4.2 displacement can support when the pump is in good condition. The Improved Stock pump provides the factory-equivalent delivery volume with better reliability than the OEM unit. The 10mm Stroker (E04 40106) is the appropriate selection when the build moves to Stage 2 or higher, adds compound turbochargers, or installs larger injectors that demand more fuel delivery volume per event than the factory pump's displacement supports.

Bottom Line

The Exergy Injection Pump Power Stroke lineup for the 6.7L platform offers two solutions to the factory CP4.2's documented limitations. The 10mm Stroker (E04 40106) is the correct pump for Stage 2 and higher builds, compound turbo setups, and larger injector applications that need more fuel delivery volume than the factory pump provides. The Improved Stock (E04 40104) is the right choice for factory-output and Stage 1 applications where improved reliability over the factory CP4.2 is the goal. Both fit 2011-2019 Ford F-250, F-350, F-450, and F-550 Super Duty with the 6.7L Power Stroke.