BFO LPT51J Diesel Fuel Injector Cat Steel Kit C6.6 320-0677

( Brand: Bfo ), ( Manufacturer Part Number: LPT51J ), ( California Prop 65 Warning: California Prop 65 Warning ), ( Fitment: For Caterpillar Cat C6.6 Engine, For Caterpillar Cat E320d E323d 420e Excavator ), ( Fitment Type: Direct Replacement ), ( Fuel Injector Type: Cr Em Injector ), ( Fuel Type: Diesel ), ( Inlet Connection Type: Threaded Connection ), ( Items Included: O-ring ), ( Material: Steel ), ( Oe/oem Part Number: 320-0677, 2645a746 ), ( Outlet Connection Diameter: 0.2756 Inch ), ( Outlet Connection Type: Inject Into The Combustion Chamber For Combustion ), ( Packaging Type: Box ), ( Performance Part: Yes ), ( Type: Fuel Injector ), ( Universal Fitment: No )

Review BFO Diesel Fuel Injector Kit Cat C6.6 Steel fits C6 E320D E323D

The **BFO LPT51J Diesel Fuel Injector Kit** is a meticulously engineered upgrade designed to enhance the performance, efficiency, and longevity of the fuel injection system in **Cummins ISX, C6.6, E320D, and E323D engines** (including those with part numbers like **320-0677**) featuring **steel body injectors**. This high-performance kit replaces the stock injectors with precision-machined, **high-flow steel components**, ensuring superior fuel atomization, reduced carbon buildup, and improved combustion dynamics. Crafted from **high-grade steel** rather than the more common brass or stainless steel alternatives, these injectors are built to withstand the extreme pressures and temperatures found in modern diesel engines, minimizing the risk of leaks, corrosion, or premature wear. The **LPT51J** designation signifies a **low-pressure, high-precision** design optimized for **common rail direct injection (CRDI) systems**, delivering a consistent and optimized fuel spray pattern that maximizes power output while reducing soot and particulate emissions. Ideal for **high-mileage engines, heavy-duty applications, or performance-focused builds**, this kit is compatible with **EUI (Electronic Unit Injector) and HEUI (Hydraulically Actuated Electronic Unit Injector) systems**, making it a versatile choice for Cummins enthusiasts seeking reliability and performance. Whether used in **trucks, buses, or marine applications**, the **BFO LPT51J** ensures cleaner combustion, smoother operation, and extended injector life making it a premium investment for those who demand the best in diesel fuel delivery technology.

### **Pros and Cons of buying a BFO LPT51J Diesel Fuel Injector Kit for CAT C6.6 (E320D/E323D, 320-0677 Steel)**

1. **OEM-Quality Replacement** The kit includes **steel injectors (320-0677)** that match the original equipment specifications, ensuring proper fitment and performance. This reduces the risk of compatibility issues compared to aftermarket alternatives that may not align with the engine s exact requirements.

2. **Improved Fuel Efficiency & Power** Properly functioning injectors enhance fuel atomization and delivery, leading to better combustion. This can result in **increased horsepower, torque, and fuel efficiency**, especially if the original injectors were worn or leaking.

3. **Extended Engine Life** Worn or failing injectors can cause **carbon buildup, poor combustion, and increased emissions**. Replacing them with high-quality steel injectors helps maintain optimal engine health, reducing long-term wear on other components like turbochargers, pistons, and exhaust systems.

4. **Compatibility with Modern Tuning** The **LPT51J** designation suggests these injectors are designed for **low-pressure turbocharged applications**, making them suitable for **remapping or forced induction upgrades**. This is beneficial if you plan to modify the engine for performance gains.

5. **Durability & Reliability** Steel injectors are generally more durable than plastic or aluminum alternatives, resisting corrosion and wear better over time. The **320-0677 part number** indicates a robust construction, which is crucial for heavy-duty diesel engines like the CAT C6.6.

6. **Reduced Emissions & Better Idle Stability** Faulty injectors can cause **rough idling, black smoke, and increased NOx/soot emissions**. Replacing them with OEM-quality parts helps maintain **cleaner operation and smoother performance**, which is important for compliance with emissions standards.

7. **Warranty & Support** BFO (a reputable diesel parts manufacturer) typically offers **warranties on their products**, providing peace of mind against defects. Their injectors are also widely used in professional diesel repair shops, indicating reliability in the industry.

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1. **High Upfront Cost** OEM-quality steel injectors are **more expensive** than generic or aftermarket alternatives. A full kit for a CAT C6.6 can cost **several hundred to over a thousand dollars**, depending on the number of injectors needed (typically 6-8 per engine).

2. **Installation Complexity** Replacing fuel injectors requires **specialized tools, proper alignment, and often a rebuild of the fuel system**. If not installed correctly, it can lead to **leaks, poor performance, or even engine damage**. This may necessitate professional installation, adding to labor costs.

3. **Potential for Counterfeit Parts** Since OEM injectors are expensive, there is a risk of **fake or low-quality replicas** being sold under the same part numbers. Buying from **authorized dealers or trusted suppliers** (e.g., Diesel Power Specialists, BFO s official distributors) is essential to avoid this issue.

4. **Compatibility with Older Engines** While the **E320D/E323D** designation suggests these injectors fit the **2000-2006 CAT C6.6**, slight variations in fuel system pressure or rail design may require **additional components** (e.g., updated fuel pumps, solenoids, or software updates). Always verify compatibility with your specific engine build year.

5. **Maintenance Requirements** Steel injectors, while durable, still require **regular cleaning and maintenance** to prevent **carbon buildup or clogging**. Neglecting fuel system maintenance can lead to premature failure of the new injectors.

6. **Potential for Overkill on Some Applications** If the original injectors were **only slightly worn** and the engine runs well, replacing them with new steel injectors may be **more expense than necessary**. In such cases, **cleaning or repairing existing injectors** could be a more cost-effective solution.

7. **Limited Availability of Spare Parts** Unlike mass-produced consumer vehicles, **CAT diesel parts can be harder to source** in some regions. Ensuring you have the correct injectors and tools before starting the job is crucial to avoid delays.

---

### **Conclusion & Recommendation**

The **BFO LPT51J steel fuel injector kit (320-0677) for the CAT C6.6 (E320D/E323D)** is a **high-quality, OEM-replacement solution** that offers **significant performance and reliability benefits** for diesel engines that require precise fuel delivery. It is particularly well-suited for:

- **Engines with failing or leaking injectors** (symptoms: rough idle, misfires, black smoke, poor power).

- **Tuned or turbocharged applications** where optimal fuel atomization is critical.

- **Owners planning long-term use** who want to avoid future injector-related failures.

However, the **high cost, installation complexity, and potential for counterfeit parts** mean this is **not a decision to be taken lightly**. If you are experiencing **noticeable performance issues** and have verified that the injectors are the root cause, this kit is a **strong recommendation**.

- **Injector cleaning** (ultrasonic or chemical).

- **Repairing existing injectors** (if they are still functional but worn).

- **Buying a used/refurbished set** (from a trusted source) to reduce costs.

- **Buy from an authorized BFO distributor** to ensure authenticity.

- **Have a diesel specialist perform the installation** if you lack experience.

- **Consider a full fuel system service** (pump, rails, filters) alongside injector replacement for best results.

- **Monitor performance post-installation** to confirm the injectors are functioning as expected.

For most **heavy-duty CAT C6.6 applications**, the **BFO LPT51J steel injectors are a worthwhile investment** if the engine s health and performance are priorities. However, weigh the cost against the current condition of your injectors to determine if replacement is truly necessary.

Details:

Always the correct part. Made with high-strength material for exceptional durability and reliability. Package included. For Caterpillar CAT E320D E323D 420E Excavator.

Compatible with High - Pressure Common Rail, Single Point Injection and Other System Adaptations. Fuel Injector Type:CR- EM. Accurate Injection Needle Valve. 1.Efficient Itemization.

PRODUCT DISPLAY Diesel Fuel Injector Kit for CAT C6.6 E320D E323D 320-0677 Steel. Quick, Simple. Showing as the picture. OE/Part number.

For Caterpillar CAT C6.6 Engine. 3.High Durability. Please be very careful to check our photos, make sure the photo showed is same as you wanted. 4.Wide Fitment.

Guaranteed Fitment. 2.Precise Control. 320-0677, 2645A746. 2.Before replacing the fuel injector, please replace filter, clean front oil pipe of and check if pump is working properly.

Please follow our return. Manufacturer. The size and shape of the nozzle orifice enhance fuel itemization optimize spray angle. Type: Fuel Injector.

Precision Electrical Connector. Fuel Type:Diesel.

part #: lpt51j prices

• $73.36-$77.66

specifications carfuelinjector:

• for models: C6, E320d, E323d
• brand: Bfo
• mpn: Lpt51j
• california prop 65 warning: California Prop 65 Warning
• fitment: For Caterpillar Cat C6.6 Engine, For Caterpillar Cat E320d E323d 420e Excavator
• fitment type: Direct Replacement
• fuel injector type: Cr Em Injector
• fuel type: Diesel
• inlet connection type: Threaded Connection
• items included: O-ring
• material: Steel
• oe/oem part number: 320-0677, 2645a746
• outlet connection diameter: 0.2756 Inch
• outlet connection type: Inject Into The Combustion Chamber For Combustion
• packaging type: Box
• performance part: Yes
• type: Fuel Injector
• universal fitment: No

general carfuelinjector:

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

shipping carfuelinjector:

• class: Standard
• type: Fixed
• service: FedEx Ground / FedEx Home Delivery
• carrier: FedEx
• transit: 2-5 Days
• cost: $0.00

returns carfuelinjector:

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

payments carfuelinjector:

• credit card: Mastercard
• wallet: Apple-pay
• other

seller carfuelinjector:

• rating: 99.5%
• # reviews: 1575
• city: Houston, Texas

offer carfuelinjector:

• quantity: 1
• sold: 0
• started: April 9, 2026
• best offers: True
• options: Ship-to-home
• availability: In Stock

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