CUMMINS 3802335RX Cavity Injector

( Brand: Cummins ), ( Manufacturer Part Number: 3802335RX ), ( Part Type: Injector )

Review CUMMINS Cavity Injector

The **Cummins 3802335RX Cavity Injector** is a precision-engineered component designed to deliver optimal fuel efficiency, performance, and reliability in Cummins diesel engines, particularly those equipped with the **Common Rail High-Pressure Fuel Injection System**. This high-quality injector is crafted from durable materials, including hardened steel and precision-machined aluminum, ensuring longevity and resistance to wear under the demanding conditions of continuous operation. The **cavity design** of the injector plays a critical role in atomizing fuel with exceptional uniformity, which enhances combustion efficiency, reduces emissions, and minimizes soot and particulate matter key factors in meeting stringent environmental regulations. Engineered to operate within Cummins advanced fuel injection systems, this injector features a **tight-tolerance nozzle assembly** that maintains consistent spray patterns, even under high-pressure conditions, typically ranging between **20,000 and 25,000 psi**. Its **self-cleaning cavity** design helps prevent clogging from fuel contaminants, ensuring sustained performance over extended engine life. Whether installed in heavy-duty trucks, marine applications, or industrial generators, the **3802335RX** is a critical component for maintaining peak engine output while adhering to emissions standards. Built to Cummins exacting standards, this injector is a testament to engineering precision, offering a balance of durability, efficiency, and compliance for demanding diesel applications.

### **Pros and Cons of Buying a Cummins 3802E335R (Cavity Injector) for a 6.7L Cummins Engine**

1. **Improved Fuel Efficiency** The cavity injector design enhances atomization and combustion, leading to better fuel economy compared to older hole-type injectors.

2. **Reduced Emissions** The improved spray pattern helps lower soot and NOx emissions, making the engine more compliant with modern emissions standards.

3. **Increased Power & Torque** Better fuel delivery results in more complete combustion, which can enhance engine performance, especially in turbocharged applications.

4. **Durability & Longevity** Cummins cavity injectors are built to last longer than their predecessors, reducing the need for frequent replacements.

5. **Compatibility with EGR & DPF Systems** The improved spray pattern works better with modern emissions control systems, reducing the risk of clogging or failure.

6. **Easier Tuning & Adjustment** Many cavity injectors allow for better calibration, making them suitable for performance modifications or remapping.

7. **Wider Availability of Parts & Support** As a newer model, replacement parts, remanufactured units, and diagnostic tools are more accessible than for older injectors.

1. **Higher Upfront Cost** Compared to older hole-type injectors, cavity injectors are more expensive to purchase, especially if buying new or remanufactured.

2. **Potential for Higher Fuel Pump Wear** The increased fuel pressure required for cavity injectors may stress the fuel pump more over time, potentially leading to premature failure if not properly maintained.

3. **Complex Installation & Tuning** Replacing injectors requires proper alignment, programming, and sometimes ECU adjustments, which may necessitate professional help.

4. **Risk of Contamination Issues** If fuel quality is poor or the fuel system is dirty, cavity injectors can clog more easily than older designs.

5. **Limited Aftermarket Support** While Cummins offers official support, some aftermarket tuners and parts may not be fully optimized for cavity injectors yet.

6. **Potential for Over-Spray in Some Cases** If not properly calibrated, the wider spray pattern can sometimes lead to fuel wastage or incomplete combustion in certain engine conditions.

7. **Compatibility Concerns with Older Systems** If the engine has outdated fuel rails, injectors, or wiring, a full system upgrade may be needed alongside injector replacement.

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### **Conclusion**

The **Cummins 3802E335R cavity injector** is a significant upgrade over older hole-type injectors, offering better fuel efficiency, emissions compliance, and power output. While the initial cost and potential maintenance considerations (such as fuel pump stress) are drawbacks, the long-term benefits especially for modern Cummins engines running under heavy loads or in emissions-restricted areas make it a worthwhile investment.

If you are running a **6.7L Cummins with a turbocharger, aftermarket tuning, or in a high-mileage application**, the cavity injector is highly recommended. However, if you are on a tight budget or running a stock, low-mileage engine, the cost may not be justified unless emissions or performance issues arise.

- The fuel system (rails, lines, pump) is in good condition.

- The ECU is properly programmed for cavity injectors.

- High-quality fuel and proper maintenance are maintained.

If you are upgrading your **6.7L Cummins for better efficiency, emissions compliance, or performance**, the **3802E335R cavity injector is a strong choice**. However, weigh the cost against your engine s current condition and intended use. If emissions or fuel economy is a priority, the upgrade is well worth it; if you are running a stock engine with no immediate issues, the benefits may not outweigh the expense. Consulting a Cummins specialist or tuner before installation is advised.

Details:

3802335RX Cavity Injector for Cummins: Part Number: Manufacturer: Cummins. Made of high-quality components for durability, reliability, and performance. Engineered using the latest technology to ensure product lasts longer in service. Engineered with a factory-like design for effortless installation, ensuring perfect match your vehicle.

Manufactured following strict OE standards to work like the original component. Designed specifically for trucks, trailers, and buses.

part #: 3802335rx prices

• $103.49-$435.63

specifications carfuelinjector:

• brand: Cummins
• mpn: 3802335rx
• part type: Injector

seller carfuelinjector:

• rating: 99.3%
• # reviews: 66491
• city: Los Angeles, California

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• class: Standard
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• type: Fixed

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general carfuelinjector:

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

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offer carfuelinjector:

• started: March 11, 2026
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