Product Description
Maximize fuel delivery for serious LLY builds with the Exergy E02 10256 NEW 300% Over Injector Set. Engineered and calibrated by Exergy Performance, these brand-new injectors with internal modification provide the massive flow required for high-horsepower applications while maintaining Exergy’s renowned quality and repeatability.
Who Is This For?
- Dedicated competition and extreme-performance street trucks
- Applications with upgraded turbo(s), stroker/aftermarket CP3, and proper tuning
- Builders who demand precise flow balancing and reliable high-rail fueling
Key Benefits
- Brand-new Exergy injectors (not reman) with internal modification
- ~300% over nominal flow to support big-power LLY combinations
- Flow-balanced, calibrated, and documented by Exergy
- Ready for high-rail pressure strategies with correct supporting mods
Fitment
- Make/Model: Chevrolet Silverado 2500HD/3500HD; GMC Sierra 2500HD/3500HD
- Engine: 6.6L Duramax LLY
- Years: 2004.5, 2005 (mid-year 2004 LLY introduction)
What’s Included
- Set of 8 NEW Exergy 300% over injectors (E02 10256)
- Calibration/flow documentation from Exergy (when provided)
Required/Recommended Supporting Parts
300% over injectors demand a fortified fuel system. Pair with Exergy fueling and quality supply components:
- Exergy E04 10205 Sportsman CP3 (LLY)
- Lift Pumps (AirDog / FASS) for stable supply & filtration
- Injector Install Gaskets & Seals
- Shop All Exergy Performance
Tuning & Setup Notes
- Custom tuning is mandatory for 300% over injectors. Stock calibrations are not compatible.
- Use high-quality fuel, adequate filtration, and confirm rail relief strategy for your setup.
- Verify return rates and rail pressure under load during validation logs.
Frequently Asked Questions
Q: Are these injectors streetable?
A: They can be used on the street in purpose-built trucks, but they are intended for high-horsepower/competition use with proper supporting mods and tuning.
Q: Do I need an upgraded CP3?
A: Yes. At minimum, pair with a high-output CP3 (e.g., Exergy Sportsman) and consider additional pumping capacity for extreme goals.
Q: Are these new or reman?
A: This is a NEW Exergy injector set with internal modification, not remanufactured.
Q: What about a core charge?
A: New sets typically do not require a core, but check the product options/checkout for any applicable charges or program details.
Q: Warranty?
A: Covered by Exergy’s manufacturer warranty. Follow proper install procedures, filtration, and tuning best practices to remain eligible.
Installation Tips
- Professional installation recommended. Replace sealing washers and torque to specification.
- Prime/bleed the fuel system thoroughly and verify no leaks before initial start.
- After install, perform balance/return rate checks and log rail pressure under load.
About Exergy Performance
Exergy is the benchmark for precision diesel fuel system components. Explore the full lineup here: Exergy Performance at CPP Diesel.
