ALLIANT POWER AP55114 Fuel Injector Gm 6.6

( Brand: Alliant Power ), ( Manufacturer Part Number: AP55114 ), ( Part Type: Fuel Injector )

Review ALLIANT POWER Reman Fuel Injector Gm 6.6 Cyl And fits LML

The **Alliant Power AP55114 Fuel Injector** is a high-performance, direct-port fuel injector specifically engineered to deliver exceptional fuel delivery precision and reliability for General Motors 6.6L Duramax diesel engines, including the LML generation. Designed with cutting-edge manufacturing techniques, this injector features a robust **piezoelectric actuator**, which provides rapid and ultra-responsive fuel delivery, ensuring optimal combustion efficiency and power output. The AP55114 is built to meet or exceed OEM specifications while incorporating advanced materials and precision machining to enhance durability and longevity, making it an ideal upgrade for enthusiasts seeking improved throttle response, smoother operation, and enhanced fuel economy. Constructed from high-grade stainless steel and coated with a proprietary wear-resistant finish, this injector is engineered to withstand the extreme pressures and temperatures found in high-performance diesel applications, reducing the risk of clogging or premature failure. The AP55114 is compatible with both stock and aftermarket fuel systems, offering seamless integration with GM s 6.6L LML engine architecture, including the common rail fuel system. Whether used in a stock build for increased reliability or in a heavily modified setup for maximum performance, this injector ensures consistent and precise fuel metering, helping to unlock the full potential of your Duramax engine. Backed by Alliant Power s reputation for quality and performance, the AP55114 is a trusted choice for diesel enthusiasts looking to elevate their engine s efficiency, power, and durability.

### **Alliant Power AP55114 Fuel Injector (GM 6.6L Duramax) Pros and Cons**

1. **OEM Compatibility** The AP55114 is designed as a direct replacement for the original GM 6.6L Duramax fuel injectors, ensuring proper fitment and functionality without modifications.

2. **High-Quality Manufacturing** Alliant Power is a reputable brand known for producing reliable aftermarket fuel injectors that meet or exceed OEM specifications.

3. **Improved Performance Potential** Some users report better fuel delivery and smoother operation compared to older or worn-out OEM injectors, especially when paired with a tune.

4. **Durability** These injectors are built to withstand high-pressure fuel systems, reducing the risk of leaks or premature failure.

5. **Widely Available** As a common Duramax part, replacements are easy to source from dealers, online retailers, and performance shops.

6. **Compatibility with Upgrades** Works well with performance parts like turbochargers, intercoolers, or fuel system upgrades, provided the system is properly tuned.

7. **Warranty Support** Many sellers offer warranties, providing some assurance against defects in materials or workmanship.

1. **Cost** While not excessively expensive, these injectors are more costly than basic OEM replacements, especially if purchasing from a specialty supplier.

2. **Installation Complexity** Replacing fuel injectors requires careful handling, proper sealing, and often a fuel system flush to remove contaminants. Improper installation can lead to leaks or performance issues.

3. **Tuning Required** If upgrading from stock injectors or adding performance parts, a tune (ECU reprogramming) is necessary to prevent rich running, fuel waste, or potential damage.

4. **Potential for Counterfeit Parts** Some aftermarket injectors, even from reputable brands, may be fakes. Buying from authorized dealers or trusted sellers minimizes this risk.

5. **Lifespan Depends on Usage** Like all injectors, these will degrade over time with heavy use, high-mileage driving, or poor fuel quality. Regular maintenance is essential.

6. **Compatibility with Older Systems** If the vehicle has an older or modified fuel system (e.g., non-OEM injectors already installed), compatibility may require additional adjustments.

7. **Limited Customization** Unlike high-end performance injectors, these are not designed for extreme power levels (e.g., 1,000 HP). For heavy builds, larger injectors (e.g., 1,200cc ) may be needed.

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### **Conclusion**

The **Alliant Power AP55114 fuel injector** is a solid choice for GM 6.6L Duramax owners seeking a reliable OEM replacement or an upgrade. It balances quality, compatibility, and performance while being widely available. However, it is not a "set-and-forget" solution proper installation, tuning, and maintenance are critical to ensuring longevity and optimal function.

If your primary goal is **replacement or mild performance gains**, this injector is a practical and cost-effective option. For **high-power applications**, larger injectors and supporting modifications (e.g., fuel pump, rail pressure adjustments) will be necessary.

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### **Recommendation**

- **Buy from an authorized dealer or trusted supplier** to avoid counterfeit parts.

- **Have a professional install it** if you lack experience with fuel system work, or at least follow proper procedures (e.g., fuel system flush, torque specifications).

- **Get a tune** if modifying the engine or replacing injectors to prevent fueling issues.

- **Monitor for leaks or performance changes** post-installation. If symptoms like rough idle, misfires, or poor power occur, inspect for clogs or improper sealing.

- **Consider a fuel system service** (e.g., injector cleaner, fuel filter replacement) before and after installation to ensure clean operation.

**Final Verdict:** The AP55114 is a **good, no-frills choice** for Duramax owners who want a direct OEM replacement or a slight performance boost without overcomplicating their build. For serious power upgrades, research higher-capacity injectors and consult with a performance specialist.

Details:

Manufactured following strict OE standards to work like the original component. Alliant Power AP55114 Reman Fuel Injector, Gm 6.6 L Lml Cyl 3 6: Part Number: Manufacturer. Made of high-quality components for durability, reliability, and performance. Designed specifically for trucks, trailers, and buses.

Engineered with a factory-like design for effortless installation, ensuring perfect match your vehicle. Engineered using the latest technology to ensure product lasts longer in service.

part #: ap55114 prices

• $400.00-$607.28

specifications carfuelinjector:

• for models: Lml
• brand: Alliant Power
• mpn: Ap55114
• part type: Fuel Injector

payments carfuelinjector:

• other
• wallet: Paypal
• credit card: Visa

returns carfuelinjector:

• time: 30 Days
• paid by: Seller
• policy: Returns Accepted

seller carfuelinjector:

• city: Los Angeles, California
• # reviews: 70196
• rating: 99.4%

general carfuelinjector:

• Air Fuel Delivery > Fuel Injection Parts > Fuel Injectors
• condition: New

offer carfuelinjector:

• options: Ship-to-home
• availability: In Stock
• quantity: 4
• started: May 12, 2026
• best offers: True
• sold: 0

shipping carfuelinjector:

• transit: 4-8 Days
• service: Standard
• cost: $0.00
• type: Fixed
• class: Standard

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