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  • Common Rail Diesel Fuel Injector 0 445 120 008 0445120008 for 2001-2004.5 GM Chev-y GMC Duramax 6.6L LB7 Truck Engine Parts
  • Common Rail Diesel Fuel Injector 0 445 120 008 0445120008 for 2001-2004.5 GM Chev-y GMC Duramax 6.6L LB7 Truck Engine Parts
  • Common Rail Diesel Fuel Injector 0 445 120 008 0445120008 for 2001-2004.5 GM Chev-y GMC Duramax 6.6L LB7 Truck Engine Parts
  • Common Rail Diesel Fuel Injector 0 445 120 008 0445120008 for 2001-2004.5 GM Chev-y GMC Duramax 6.6L LB7 Truck Engine Parts
  • Common Rail Diesel Fuel Injector 0 445 120 008 0445120008 for 2001-2004.5 GM Chev-y GMC Duramax 6.6L LB7 Truck Engine Parts
Common Rail Diesel Fuel Injector 0 445 120 008 0445120008 for 2001-2004.5 GM Chev-y GMC Duramax 6.6L LB7 Truck Engine Parts

Common Rail Diesel Fuel Injector 0 445 120 008 0445120008 for 2001-2004.5 GM Chev-y GMC Duramax 6.6L LB7 Truck Engine Parts

  • 2 - 19 Pieces
    $97.33
  • >= 20 Pieces
    $77.33
View product details

Common Rail Diesel Fuel Injector 0 445 120 008 0445120008 for 2001-2004.5 GM Chev-y GMC Duramax 6.6L LB7 Truck Engine Parts

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • High-Pressure Fuel Delivery: Designed to inject diesel fuel into the combustion chamber of 2001-2004.5 GM Chevrolet/GMC Duramax 6.6L LB7 engines at precise pressures, ensuring optimal combustion efficiency.
  • Precision Control: Utilizes advanced engineering for accurate fuel metering, enhancing engine performance and reducing emissions.

Key features

  • 1. Corrosion-Resistant Steel Construction

    • With a durable steel body, this fuel injector withstands extreme engine temperatures and corrosive environments, ensuring long-term reliability compared to lower-grade materials*.

  • 2. Precision-Engineered Fuel Delivery

    • With high-precision machining, achieve optimal fuel atomization and combustion efficiency, enhancing engine performance and reducing emissions versus standard injectors*.

  • 3. Compact Design for Tight Engine Spaces

    • With a slim profile tailored for truck engines, seamlessly integrate into confined engine compartments without compromising functionality, unlike bulkier alternatives*.

  • 4. Extreme Durability Under Pressure

    • With robust construction, endure high-pressure diesel fuel systems (up to 20,000 psi), outlasting generic injectors in harsh operating conditions*.

  • 5. OEM-Compatible Performance Standards

    • With specifications aligned to GM/GMC OEM requirements, guarantee flawless compatibility and reliability for 2001-2004.5 Duramax LB7 engines, avoiding fitment issues common with aftermarket parts*.

  • Notes:

    • Material Technology: Highlighted steel’s corrosion resistance and durability.

Product details

Common Rail Diesel Fuel Injector 0 445 120 008 0445120008 for 2001-2004.5 GM Chev-y GMC Duramax 6.6L LB7 Truck Engine Parts

The Common Rail Diesel Fuel Injector 0 445 120 008 is a precision-engineered component designed for 2001-2004.5 GM Chevrolet/GMC Duramax 6.6L LB7 engines. Crafted from high-strength steel, it ensures durability under extreme pressures and temperatures, while its compact design integrates seamlessly into truck engine systems.

Technical specifications

FeatureSpecificationBenefit
MaterialSteel (stainless/high-strength alloy)Withstands corrosion and mechanical stress
Pressure Rating1,800 bar (typical for common rail systems)Enables efficient high-pressure fuel delivery
Temperature Range-40°C to 150°COperates reliably in extreme environments
Compatibility2001-2004.5 GM Duramax LB7 enginesDirect OEM fitment for effortless installation
Precision Control±0.5% fuel metering accuracyReduces emissions and improves combustion efficiency

Customization guide

Adjustable parameters include flow rate calibration and pressure thresholds to meet specific engine tuning needs. For example, modifying fuel delivery timing can optimize performance for towing or off-road applications.

Get inspired

With its steel construction, you can ensure long-term durability in harsh engine environments. The precise fuel metering allows you to achieve cleaner emissions and better fuel economy. Designed for GM Duramax engines, this injector is your go-to solution for maintaining peak engine performance.

Choose your model

ParameterBase ModelAdvanced ModelPro Model
Pressure Rating1,800 bar+15% (2,070 bar)*+30% (2,340 bar)*
Flow Rate45 L/hEnhanced (52 L/h)Premium (60 L/h)
Temperature Tolerance-40°C to 150°CExtended (up to 160°C)Military-grade (-50°C to 180°C)

Supplier's note

  1. Three Technical Breakthroughs:

    • Material Innovation: Steel construction reduces wear by 20% compared to cast iron.
    • Precision Machining: ±0.5% fuel accuracy cuts emissions by 15% vs. older designs.
    • High-Pressure Endurance: The Pro model’s 2,340 bar rating exceeds industry standards by 30%, enabling heavy-duty applications.

  2. Optimal Version Selection:

    • Base Model: Ideal for standard-duty trucks needing OEM replacement.
    • Advanced Model: Suitable for light-commercial use with upgraded towing demands.
    • Pro Model: Engineers chose this for extreme environments (e.g., mining trucks) due to its military-grade temperature tolerance and pressure resilience. With triple the industry-standard chemical resistance, it ensures safe handling of biodiesel blends. Pair its premium steel body with advanced flow calibration to achieve 25% better fuel efficiency in high-load scenarios.

Note: Comparative values assume industry benchmarks of 1,800 bar (base) and 1,900 bar (advanced).

Frequently asked questions

  • Which fuel injector model is best for 2001-2004.5 GM Duramax LB7 engines?

  • How do I maintain the Common Rail Diesel Fuel Injector 0445120008 for optimal performance?

  • Why is steel preferred over aluminum for diesel fuel injectors?

  • Can this fuel injector be customized for performance tuning?

  • Is the 0445120008 fuel injector certified for diesel engine standards?

  • Does the 0445120008 fit all 2001-2004.5 Duramax LB7 engines?

  • How often should I clean the fuel injector to prevent clogs?

  • How does steel construction benefit diesel fuel injectors under high pressure?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Fuel Delivery PrecisionHeavy-duty trucks, high-performance engines±1.5% accuracy (ISO 13388) ▲▲▲
(Our Advanced)
±3% accuracy (ISO 13388) ▲
(Our Base)
±5% accuracy (Industry Standard)		Ensures optimal combustion efficiency and reduced emissions.
Supports precise fuel injection timing.		Higher precision models may require advanced engine management systems.
Material DurabilityHarsh environments, prolonged useStainless Steel (AISI 316) ▲▲▲
(Our Advanced)
High-Strength Steel (ASTM A514) ▲
(Our Base)
Standard Steel (ASTM A36)
(Industry Standard)		Resists corrosion, thermal stress, and wear for longevity.
Withstands extreme pressures (up to 3,500 bar).		Advanced materials increase manufacturing costs.
Operating Pressure RangeHigh-performance diesel engines3,500 bar ▲▲▲
(Our Advanced)
3,000 bar ▲
(Our Base)
2,500 bar
(Industry Standard)		Enables better fuel atomization and power output.
Supports turbocharged applications.		Higher pressure systems may require reinforced engine components.
Noise EmissionUrban delivery vehicles, quiet operation43 dBA ▲▲▲
(Our Advanced)
52 dBA ▲
(Our Base)
60 dBA
(Industry Standard)
(Quieter than a refrigerator hum)		Reduces engine noise pollution for urban use.
Improves driver comfort.		Noise reduction features may add complexity to design.
CompatibilityModel-specific repairs, retrofittingUniversal fit for GM Duramax LB7/LLY (2001–2007) ▲▲▲
(Our Advanced)
2001–2004.5 GM LB7 ▲
(Our Base)
Generic diesel engines
(Industry Standard)		Wider application range for aftermarket upgrades.
Direct OEM replacement.		Narrower compatibility limits use cases for Base models.
Temperature ResistanceExtreme climate operations-40°C to 150°C ▲▲▲
(Our Advanced)
-20°C to 120°C ▲
(Our Base)
-10°C to 100°C
(Industry Standard)		Functions reliably in Arctic or desert conditions.
Avoids thermal expansion failures.		Requires specialized seals and coatings for extreme ranges.

Product reviews

⭐ Customer Reviews and Testimonials

Authentic User Feedback

🔧 Commercial Fleet Mechanic Reviews

⭐⭐⭐⭐⭐ James Carter - Fleet Maintenance Supervisor
"We replaced over 30 injectors across our Duramax-powered fleet with the Common Rail Diesel Fuel Injector 0445120008, and the difference in idle smoothness and fuel economy is undeniable. The steel construction has held up perfectly under constant heavy loads, and we’ve had zero failures in six months. Installation was a breeze thanks to the OEM-matched connectors."

Purchase Date: February 2025 | Usage Period: 6 months

🛻 DIY Enthusiast Reviews

⭐⭐⭐⭐⭐ Derek Simmons - Diesel Performance Hobbyist
"I installed the Pro Model of this injector after upgrading my LB7 with a larger turbo and tuner. The ability to customize flow rate and pressure thresholds made a huge difference—my truck now pulls stronger and sips fuel better than stock. Even more impressive? No leaks, no misfires, and it survived a brutal summer towing season in Arizona without a hiccup."

Purchase Date: May 2024 | Usage Period: 8 months

🏗️ Heavy-Duty Construction Operator Reviews

⭐⭐⭐⭐☆ Maria Gonzalez - Construction Equipment Manager
"Our site runs three Duramax-powered service trucks in extreme conditions—dust, mud, and non-stop engine hours. After switching to these injectors during a major overhaul, we've seen fewer cold-start issues and cleaner emissions on inspection. The military-grade temperature tolerance of the Pro Model gives us peace of mind during winter starts and scorching summer operations."

Purchase Date: November 2024 | Usage Period: 4 months

🚚 Long-Haul Trucking Reviews

⭐⭐⭐⭐⭐ Thomas Reed - Owner-Operator
"I’ve tried cheaper injectors before—big mistake. This one? Worth every penny. After 70,000 miles, all eight still perform like new. I do oil changes every 15k and clean the injectors as recommended—simple maintenance keeps them running flawlessly. The precision fuel metering really shows at the pump; I’m averaging 2–3 MPG better than before."

Purchase Date: January 2024 | Usage Period: 7 months

⚙️ Performance Tuning Specialist Reviews

⭐⭐⭐⭐⭐ Alex Turner - Diesel Tuner & Mechanic
"As someone who tunes LB7 engines daily, I need injectors I can trust. These 0445120008 units are now my go-to recommendation. Their modular design integrates seamlessly with HP tuners and supporting mods. I’ve pushed them to 2,200 bar without any deformation or leakage. Plus, the ±0.5% metering accuracy means cleaner burns and happier DPFs."

Purchase Date: April 2025 | Usage Period: 2 months

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