DDP DDPNLLY-SM DURAMAX 04.5-05 LLY CUSTOM SUPER MENTAL BRAND NEW INJECTOR SET

The DDP NLLY-SM Sportsman Injector Set is built for serious performance on the 2004.5–2005 Duramax LLY platform. These injectors offer the fuel volume and flow characteristics needed to support 850+ rear-wheel horsepower, making them ideal for drag racing, sled pulling, or aggressive street builds.

DDP crafts each set from brand-new Bosch OE injector bodies, then modifies and balances them to exacting specs. They deliver exceptional atomization, high-end fueling, and smooth idle despite their extreme capabilities — all while maintaining top-tier reliability.

Fitment Applications

• 2004.5–2005 Chevrolet Silverado 2500HD / 3500HD

• 2004.5–2005 GMC Sierra 2500HD / 3500HD

• 6.6L Duramax LLY (mid-year 2004.5+)

• Compatible with factory or built engines (with required supporting mods)

 Not compatible with LB7 or LBZ/LLM engines. Requires dual fuelers, upgraded turbo, transmission, and tuning.

Key Features

•  Flow-matched within ±1% for even cylinder fueling

•  Supports up to 850–900 RWHP

•  Built from new Bosch OE injector bodies

•  Drop-in fitment for LLY Duramax

•  Designed for competition-level builds

•  Precision-built and tested in the USA

Recommended Supporting Upgrades

• Dual CP3 or stroker injection pump

• High-performance turbo (single or compounds)

• Built transmission (Allison or conversion)

• Lift pump and fuel system upgrades

• EFI Live or similar custom tuning

Unleash the full potential of your LLY Duramax with the DDP NLLY-SM Sportsman Injector Set — perfect for high-horsepower applications where precision and performance matter most.