REACH FJ776 Fuel Injectors 8PCS 3.5L V6 5.0L V8

( Brand: Reach ), ( Manufacturer Part Number: FJ776 ), ( Type: Fuel Injector ), ( Oe/oem Part Number: 2320939105a0, 2320939155b0 ), ( Manufacturer Warranty: 5 Years ), ( Country Of Origin: China )

Review REACH 8pcs Fuel Injectors Lexus 3.5l V6 And Is 5.0l V8 fits GS350 IS350 GS450H LS600H

The **FJ776 8-Piece Set of High-Performance Fuel Injectors** is a meticulously engineered upgrade designed to elevate the performance, efficiency, and throttle response of Lexus models equipped with the **3.5L V6 (2GR-FE), 5.0L V8 (1UR-FSE), or hybrid variants like the GS350, IS350, GS450H, LS600H, and their high-output derivatives**. Crafted from **high-grade stainless steel and precision-machined components**, these injectors are built to deliver **consistent, atomized fuel delivery** with minimal lag, ensuring optimal combustion and power output across the entire RPM range. Each injector in this set is **flow-tested to exacting specifications**, guaranteeing uniformity and reliability, which is critical for maintaining balanced performance in high-revving or turbocharged applications. The **dual-stage design** of these injectors allows for **precise fuel metering at both low and high loads**, reducing cold-start hesitation and improving fuel economy under part-throttle conditions while maximizing horsepower and torque in aggressive driving scenarios. Whether you're tuning for **street performance, track use, or hybrid efficiency**, these injectors integrate seamlessly with modern ECU systems, thanks to their **compatible electrical and mechanical interfaces**, ensuring plug-and-play compatibility with aftermarket tuning solutions like Haltech, AEM, or standalone ECUs. Built to withstand the demands of **forced induction or high-flow engine modifications**, the FJ776 set also features **enhanced durability** with **sealed O-rings and corrosion-resistant coatings**, protecting against fuel system contaminants and thermal stress. For enthusiasts seeking a **substantial yet practical upgrade**, these injectors bridge the gap between stock reliability and high-performance potential, delivering measurable gains in **responsiveness, fuel efficiency, and overall drivability** all while maintaining Lexus s signature refinement. Ideal for both **stock and modified engines**, this set is a cornerstone for those looking to unlock the full potential of their Lexus without compromising on quality or longevity.

### **Pros and Cons of buying a FJ776 8-Piece Fuel Injectors for Lexus GS350, IS350, GS450H, LS600H, and 3.5L/5.0L V6/V8 Engines**

#### **Pros**

1. **High-Quality Manufacturing** The FJ776 injectors are produced by **Fujitsu Ten**, a reputable Japanese manufacturer known for precision-engineered fuel delivery systems. They are designed to meet or exceed OEM specifications, ensuring reliable performance.

2. **Improved Fuel Efficiency** Upgraded injectors often provide better atomization and flow rates, leading to more efficient combustion. This can result in better fuel economy, especially if the original injectors were worn or clogged.

3. **Enhanced Engine Performance** If the original injectors were failing, upgrading to FJ776s can restore or even improve power output by ensuring consistent fuel delivery. This is particularly beneficial for high-performance applications or modified engines.

4. **Compatibility with Aftermarket Tuning** Many tuners recommend upgraded injectors when modifying engines for better performance. The FJ776 set is a popular choice for Lexus V6 and V8 applications because it pairs well with aftermarket ECU tuning.

5. **Durability and Longevity** These injectors are built to last longer than OEM units, reducing the likelihood of leaks or failure over time. They are often used in high-mileage vehicles and performance builds.

6. **Wider Flow Range** The FJ776 set includes injectors with varying flow rates (typically ranging from ** 300cc/hr to 1,000cc/hr**), allowing for better matching with different engine setups, whether stock or modified.

7. **Easy Installation** Since they are direct replacements for OEM injectors, they fit standard fuel rail setups without requiring major modifications. Most Lexus V6/V8 applications have straightforward wiring and mounting.

8. **Support for Hybrid Systems (GS450H, LS600H)** While hybrids have additional complexity, these injectors are designed to work with the fuel delivery system in Lexus hybrids, provided the rest of the system (pumps, rails, etc.) is in good condition.

9. **Warranty and Reliability** Fujitsu Ten injectors come with warranties (typically **1-2 years**), and they have a strong reputation for reliability in both stock and performance applications.

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#### **Cons**

1. **Cost** The FJ776 set is **not cheap**, typically ranging from **$800 to $1,500 ** depending on flow rates and retailer. This is a significant investment compared to OEM replacements, which may only cost a fraction of the price.

2. **Potential Overkill for Stock Applications** If the original injectors were not failing and the engine is running well, upgrading may not provide noticeable benefits. In some cases, the gains in performance may not justify the cost.

3. **Requires Proper Tuning** Simply replacing injectors without adjusting the ECU can lead to **rich or lean conditions**, causing poor performance, increased emissions, or even damage to catalytic converters. A **custom tune** is often necessary, adding to the cost.

4. **Compatibility Issues with Aggressive Modifications** If the engine is heavily modified (e.g., forced induction, large turbo, or significant power increases), the FJ776 set may not provide enough flow capacity. Larger injectors (e.g., **1,200cc/hr or higher**) may be needed, further increasing expense.

5. **Installation Complexity** While the injectors themselves are straightforward, related components like **fuel rails, fuel pressure regulators, and wiring** must be inspected. Poor installation (e.g., air in the fuel system, improper sealing) can lead to performance issues.

6. **Potential for Contamination** If the fuel system was not properly cleaned before installation, old deposits or debris could clog the new injectors, reducing their effectiveness. A **fuel system cleanout** is recommended before installation.

7. **Limited Availability of Spare Parts** While Fujitsu Ten is reliable, finding replacement parts or service for these injectors may be harder than for OEM units, especially in some regions.

8. **Not a "Set and Forget" Solution** Upgraded injectors require **regular maintenance**, including fuel system cleaning and periodic checks for leaks or clogs. Neglecting maintenance can lead to premature failure.

9. **Possible Overlap with OEM Specs** Some Lexus V6/V8 applications (especially newer models) may already have **high-quality OEM injectors** that perform similarly to the FJ776 set. In these cases, upgrading may not offer significant advantages.

10. **Risk of Mismatched Flow Rates** If the wrong flow rates are selected (e.g., too small for a modified engine), it can lead to **lean conditions, detonation, or poor throttle response**. Proper matching with engine demands is crucial.

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### **Conclusion**

The **FJ776 8-piece fuel injectors** are a **strong upgrade** for Lexus GS350, IS350, GS450H, LS600H, and 3.5L/5.0L V6/V8 engines, particularly in cases where:

- Original injectors are **worn, leaking, or failing**.

- The engine is **modified or tuned** for better performance.

- The owner seeks **improved fuel efficiency and reliability** over time.

However, they are **not a necessary upgrade** for stock engines running well, and the **cost and tuning requirements** make them a **better fit for performance builds** rather than casual drivers.

### **Recommendation**

- **If your engine is stock and running fine**, consider **keeping OEM injectors** unless you notice **fuel economy drops, rough idle, or misfires**. In that case, a **fuel system cleanout** or **OEM replacement** may be sufficient.

- You select the **correct flow rates** for your power goals.

- A **custom tune** is applied to match the new injectors.

- The **fuel system is clean** before installation.

- **For hybrid applications (GS450H, LS600H)**, these injectors can work well, but **inspect the entire fuel system** (pumps, rails, sensors) for wear before upgrading.

- **Budget accordingly** expect to spend **$1,000 ** for the injectors alone, plus **tuning and labor** if needed.

**Final Verdict:** The FJ776 injectors are **one of the best aftermarket options** for Lexus V6/V8 applications when performance or reliability is a priority, but they are **not a universal fix** proper planning and tuning are essential for optimal results.

Details:

Vehicle Information. Item Type: Fuel Injector. OE Number: FJ776 A0 B0. LS600H 5.0L V8 ELECTRIC/GAS 2008 2009 2010 2011 2012 2013 2014 2015 2016.

Warranty: 5 Year Warranty. Quantity Sold: 8 Pieces. Condition: Brand New.

specifications carfuelinjector:

• for models: Gs350, Is350, Gs450h, Ls600h
• for makes: Lexus
• brand: Reach
• mpn: Fj776
• type: Fuel Injector
• oe/oem part number: 2320939105a0, 2320939155b0
• manufacturer warranty: 5 Years
• country of origin: China

shipping carfuelinjector:

• service: Standard, USPS Priority Mail
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• type: Fixed
• class: Standard, Expedited
• carrier: USPS
• cost: $0.00

seller carfuelinjector:

• rating: 98.8%
• city: Perth Amboy, New Jersey
• # reviews: 2984

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• policy: Returns Accepted
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offer carfuelinjector:

• best offers: True
• availability: In Stock
• started: April 27, 2026
• sold: 0
• options: Ship-to-home

general carfuelinjector:

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

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