Product Description
Feed serious power on your LLY with the Exergy E02 10260 NEW 400% Over Injector Set. These brand-new (not reman) Exergy Performance injectors feature internal modifications for extremely high flow, precise control, and durability under extreme cylinder pressures. Perfect for dedicated race/competition builds where fuel demand far exceeds stock capacity.
Key Benefits
- NEW 400% over Exergy injectors – massive fuel delivery for high horsepower builds
- Internal modification for improved stability and repeatability at extreme flow
- Individually tested, balanced, and flow-verified by Exergy Performance
- Optimized spray pattern and control for drivability relative to size (with proper tuning)
Fitment
- Platform: 2004.5–2005 GM Duramax 6.6L LLY (Chevrolet Silverado / GMC Sierra 2500HD–3500HD)
- Direct fit to LLY cylinder heads and rails; requires custom tuning and supporting fuel & air mods
What’s Included
- (8) NEW Exergy 400% Over Injectors – LLY specific
- Flow sheets / balance data from Exergy (when provided by manufacturer)
Recommended Supporting Parts
At 400% over, proper supply and control are critical. Pair with Exergy components and proven accessories:
- Shop All Exergy Performance
- Exergy LLY Injectors & Components
- Lift Pumps (AirDog / FASS)
- Turbochargers & Airflow Upgrades
- Install Gaskets & Seals
Install & Tuning Notes
- Tuning is mandatory. 400% over injectors require custom calibration and adequate CP3/CP4 supply.
- Use a quality lift pump and filtration. Fuel contamination is the #1 cause of injector failure.
- Intended for competition/off-road builds where emissions compliance is not applicable.
Frequently Asked Questions
Q: Are these injectors new or reman?
A: They are NEW Exergy injectors with internal modifications, not remanufactured units.
Q: Do I need tuning?
A: Yes. 400% over injectors cannot be safely or properly operated without custom tuning specific to your setup.
Q: What CP3 and lift pump should I run?
A: High-flow CP3(s) and a premium lift pump are strongly recommended to maintain rail pressure and protect the system. See our lift pump options and consult us for CP3 recommendations.
Q: Will these pass emissions?
A: No. These are intended for competition/off-road use where emissions compliance does not apply.
Q: Is there a core charge?
A: No core charge on new injector sets. (Policies vary by product; see your cart for details.)
About Exergy Performance
Exergy is a leader in precision diesel fuel system engineering and testing. Explore more Exergy products here: Exergy at CPP Diesel.
