Product Description

Industrial Injection 0986437308DD “Double Dragon 120 CP3 Injection Pump - 2004.5-2005 GM 6.6L Duramax LLY

Make your LLY fueling unstoppable. The Industrial Injection “Double Dragon 120 is a 120% over reman CP3 engineered to hold rail pressure at power levels where stock pumps fall flat. Built with brand-new Bosch OEM internals and a new Bosch Fuel Metering Valve (FCA), each pump is calibrated to exceed OEM spec and backed by a 1-year, unlimited-mileage warranty.

• 120% over flow for serious horsepower builds
• New Bosch FCA installed and calibrated
• Balanced, flow-verified, and tested to exceed OEM standards
• Ideal for big injectors, compounds, or Dual CP3 setups (kit available)
• Designed specifically for 2004.5-2005 GM 6.6L LLY

Fitment

• 2004.5-2005 Chevrolet Silverado/Sierra 2500HD & 3500HD - 6.6L Duramax LLY

What's Included

• Industrial Injection 0986437308DD “Double Dragon 120 Reman CP3 Pump
• New Bosch Fuel Metering Valve (FCA)

Recommended Parts

High-flow CP3s thrive on rock-solid supply pressure and clean fuel. Pair this pump with:

• Lift pump: AirDog II-5G DF-100 (01-10 Duramax) or FASS Titanium Signature Series (01-10 Duramax)
• Dual fueler hardware: Industrial Injection Dual CP3 Kit (No Pump) - 04.5-05 LLY
• Browse all GM CP3 components: GM Duramax CP3 Pumps & Components
• Shop all Industrial Injection at CPP: Industrial Injection @ CPP Diesel

Notes

• Core charge applies. Return like-for-like CP3 core for full credit.
• Tuning and adequate lift-pump supply are highly recommended for best results.
• Intended for high-fueling builds; ensure injector/turbo system matches your goals.

FAQ

Do I need a lift pump with a 120% CP3?

Yes, we strongly recommend a quality lift pump to stabilize supply pressure and protect the CP3. See our AirDog and FASS options for 01-10 Duramax.

Will this pump work on LB7, LBZ, LMM, or LML?

No. This listing is engineered for the 2004.5-2005 LLY only. For other generations, shop our full GM CP3 pumps/components.

Is tuning required?

While the truck can run without custom tuning, proper calibration is recommended to take advantage of the added fuel volume and to manage smoke/EGTs safely.

What size injectors pair well with a 120% pump?

Common builds pair 45%-100% over injectors and upgraded turbo(s). For drag/competition setups, consider a dual-fueler with this pump and suitable injectors.

Is this emissions legal?

49-state legal per manufacturer notes; CARB status may vary by configuration and use. Check local laws before purchase/installation.