Product Description
Feed your LLY the fuel it needs with the Exergy E04 10207 12mm Stroker CP3. This LBZ-based high-output pump is calibrated and flow-verified by Exergy Performance to deliver substantially increased volume over stock while maintaining excellent drivability when paired with proper supporting mods and tuning.
Key Benefits
- 12mm stroker CP3 (higher displacement vs. stock) for significantly greater fuel volume
- LBZ-based architecture for durability and smooth, consistent rail pressure
- Exergy-calibrated and flow-verified for repeatable, documented performance
- Direct-fit for 2004.5–2005 LLY with factory-style connections and mounting
Fitment
- Make/Model: Chevrolet Silverado 2500HD/3500HD; GMC Sierra 2500HD/3500HD
- Engine: 6.6L Duramax LLY
- Years: 2004.5, 2005 (mid-year LLY introduction)
What’s Included
- Exergy E04 10207 12mm Stroker CP3 Pump (LBZ-based)
- Unit assembled, calibrated and flow-checked by Exergy
- Basic install guidance
Recommended Supporting Parts
To realize the full benefit of a 12mm pump and protect your investment, pair with a quality lift pump and (as needed) matched Exergy-brand injectors:
- GM Duramax Lift Pumps (AirDog / FASS)
- Exergy LLY Injector Sets:
- Duramax Gaskets & Seals
- Shop All Exergy Performance
Install Notes
- Lift pump required for stable supply pressure and filtration on stroker pumps.
- Tuning required on modified setups to properly command rail pressure and fueling.
- Prime/bleed system thoroughly after install. Use clean fuel and quality filtration—contamination is the #1 cause of failure.
Frequently Asked Questions
Q: Is this a direct bolt-in for LLY?
A: Yes, it installs with factory-style lines and mounts on 2004.5–2005 LLY trucks.
Q: Do I need a lift pump with a 12mm CP3?
A: Absolutely. A lift pump stabilizes inlet supply, improves filtration, and supports pump longevity. See our Duramax lift pumps.
Q: Which injectors pair best?
A: Match injector size to your goals. For street/tow, 30–45% over works well; for higher power, 60%–250% over sets are available—see the Exergy LLY links above.
Q: Is there a core charge or warranty?
A: Core/warranty details vary by batch and are shown at checkout or product options. Exergy manufacturer warranty applies when installation and filtration guidelines are followed.
About Exergy Performance
Exergy is a leader in precision diesel fuel system components for Duramax platforms and more. Explore the full lineup here: Exergy Performance at CPP Diesel.
