DDP DDPNLLY-75 DURAMAX 04.5-05 LLY BRAND NEW INJECTOR SET 30 PERCENT OVER 75HP

Unlock a solid +75 HP boost with DDP’s DDPNLLY‑75—a brand-new, flow-matched injector set designed to support up to 675 RWHP on your 2004.5–2005 LLY Duramax. This is the maximum flow upgrade that maintains stock CP3 pump and turbo compatibility, making it ideal for street performance builds without major fueling upgrades.

 Key Features

• 30% Increased Fuel Flow – Delivering a noticeable power increase while retaining smooth drivability

• Rated for ~675 RWHP – Supportive of boosted performance setups without requiring fuel system upgrades

• Large SAC Nozzle Design – Features a 7‑hole pattern with dual pilots to enhance combustion efficiency
  

• Matched & Balanced Set – Each injector is flow-tested and synchronized for smooth operation
  

• Brand-New, No Core Charge – Ships fresh—easy install with zero core return hassle
  

• 2-Year Unlimited Mileage Warranty – Coverage included with every set
  

• Not for Heavy Towing – Best suited for street use; not recommended for frequent heavy loads
  

• ⚠️ Not Street-Legal in California – Restricted due to Prop 65 regulations
  

 Vehicle Fitment

• Engine: 6.6 L Duramax LLY

• Years: 2004.5–2005 Chevrolet/GMC 2500 & 3500 HD

• Fueling Compatibility: Works with stock CP3 and turbo – no fueling upgrades required.

 What’s Included

• (8) Brand-new, matched injectors

• Flow-test certification and documentation

• 2-year warranty paperwork

• Free U.S. ground shipping

 Why It’s a Top Pick

• Maximum Safe Power on Stock Fueling: 30% flow bump is the highest safe increase for stock setups.

• Balanced & Dependable: Matched set ensures smooth RPM behavior and throttle response.

• Core-Free Convenience: Easy install, great value.

• Performance without Overload: Ideal for daily driving or light towing.