Product Description
Feed your LML the fuel it needs with the Exergy E04 10506 10mm Stroker CP4.2 Pump. This Scorpion-based CP4.2 features a 10mm cam for increased displacement, tighter internal tolerances, and Exergy’s calibration/flow verification for consistent rail pressure on performance builds—while preserving OE-like drivability.
Key Benefits
- 10mm stroker CP4.2 (Scorpion-based) for higher pump output vs. stock CP4.2
- Calibrated and flow-verified by Exergy for repeatable, balanced fueling
- Direct-fit for LML with factory-style lines, brackets, and drive
- Ideal with tuning and upgraded supply (lift) pump on higher power builds
Fitment
- Make/Model: Chevrolet Silverado 2500HD/3500HD; GMC Sierra 2500HD/3500HD
- Engine: 6.6L Duramax LML
- Years: 2011, 2012, 2013, 2014, 2015, 2016
What’s Included
- Exergy E04 10506 10mm Stroker CP4.2 Pump (Scorpion-based)
- Pre-calibrated assembly ready for installation
- Basic install guidance
Recommended Supporting Parts
Stabilize supply pressure and match demand with an in-tank or frame-mounted lift pump, and choose Exergy-brand LML injectors sized for your goals:
- GM Duramax Lift Pumps (Category)
- Exergy LML Injector Sets (2011–2016):
- Shop All Exergy Performance
Install Notes
- Professional installation recommended; thoroughly prime/bleed the fuel system after install.
- Custom tuning is recommended to fully utilize added pump capacity.
- Maintain clean fuel and quality filtration; contamination is the #1 cause of HPFP failure.
Frequently Asked Questions
Q: Is this a direct replacement for the LML CP4.2?
A: Yes—bolt-in on 2011–2016 LML using factory lines and mounting points.
Q: Do I need a lift pump?
A: Strongly recommended to stabilize supply pressure and extend pump life. See our Duramax lift pump options.
Q: Which injectors pair best?
A: Stay within Exergy’s matched LML sets above. Choose 30–60% over for tow/street builds; 100–200% over for high horsepower with appropriate turbo, fuel, and tuning. Links above are to Exergy-only LML injectors.
Q: Is there a core charge?
A: Some pumps carry a refundable core; if applicable you’ll see details in the product options or at checkout.
Q: Warranty?
A: Covered by Exergy’s manufacturer warranty. Keep proof of purchase and follow proper install/filtration practices.
