Product Description
Push your LLY build deep into race territory with the Exergy E02 10254 NEW 250% Over Injector Set. Engineered and flow-balanced by Exergy Performance, these injectors deliver the fuel volume and control needed for big-single or compound turbo setups while maintaining precise metering and repeatability.
Key Benefits
- NEW Exergy injectors—precision matched, balanced, and flow-verified
- ~250% over stock flow for serious horsepower goals (tuning & air required)
- Optimized spray pattern and tight tolerances for consistent cylinder-to-cylinder fueling
- Built for high-performance street/strip and competition applications
Fitment
- Make/Model: Chevrolet Silverado 2500HD/3500HD; GMC Sierra 2500HD/3500HD
- Engine: 6.6L Duramax LLY
- Years: 2004.5–2005 (mid-2004 LLY introduction through 2005)
What’s Included
- One (1) NEW Exergy 250% Over LLY injector set (complete set)
- Flow sheet(s) and calibration data from Exergy (when provided by manufacturer)
Recommended Supporting Parts
At this flow level, you must support the fuel system and air side. Popular, proven pairings:
- Exergy CP3 Pumps for LLY:
- GM Duramax Lift Pumps (category) – stabilize supply pressure and filtration
- Shop the full Exergy lineup: Exergy at CPP Diesel
Install Notes
- Professional installation and custom tuning are required at this injector size.
- Airflow upgrades (turbo(s), intercooling, exhaust) strongly recommended.
- Always verify rail pressure capability and CP3 capacity for target power.
- Use fresh fuel filters and maintain strict cleanliness to protect new injectors.
Frequently Asked Questions
Q: Can I run these with a stock CP3?
A: No—250% over requires a high-capacity CP3 (or dual fuelers). See Exergy 12mm/14mm pumps above.
Q: Will my truck drive well on the street?
A: With proper tuning and adequate air, many customers street-drive big setups, but these are built for high-power goals.
Q: Do I need a lift pump?
A: Yes. A quality lift pump is critical for supply pressure, filtration, and injector/pump life. Browse our lift pump options.
Q: New vs. reman—what’s the difference?
A: NEW Exergy injectors use new bodies and internals; remans start from OE cores. Both are calibrated and flow-matched by Exergy.
Q: Warranty?
A: Covered under Exergy’s manufacturer warranty—keep proof of purchase and follow installation/tuning best practices.
About Exergy Performance
Exergy is a leader in precision diesel fuel systems for Duramax platforms. Explore more Exergy parts here: Exergy Performance at CPP Diesel.
