AFE POWER 46-39105 Fuel Injection Throttle Body 802959410394

( Brand: Afe Power ), ( Manufacturer Part Number: 46-39105 ), ( Type: Truck Car ), ( Item Length: 8.300 ), ( Item Height: 8.200 ), ( Country Of Origin: Us ), ( UPC: 802959410394 )

Review AFE POWER Fuel Injection Throttle Body

The **AFE Power 46-39105 Fuel Injection Throttle Body** is a high-performance, precision-engineered component designed to elevate the performance, responsiveness, and drivability of fuel-injected engines across a wide range of applications, from high-performance street machines to demanding off-road and racing setups. Crafted from durable, high-grade materials, this throttle body features a robust **aluminum housing** with a sleek, aerodynamic design that ensures minimal air restriction while maximizing airflow efficiency. Its **mechanical throttle control** is engineered for smooth, linear operation, allowing for precise throttle response and eliminating the lag often associated with stock or lower-quality aftermarket units. The throttle body incorporates a **high-flow throttle plate** with a **butterfly valve mechanism**, which is designed to open and close with minimal friction, ensuring consistent and repeatable performance under varying load conditions.

One of the standout features of the AFE Power 46-39105 is its **integrated fuel rail and injector mounting system**, which simplifies installation and ensures proper alignment with the engine s fuel delivery system. The throttle body is compatible with a variety of **OEM and aftermarket fuel injectors**, including those with **16-24 lb/hr flow rates**, making it a versatile choice for engines ranging from naturally aspirated setups to those with mild forced induction. The **sealed throttle body assembly** includes a **throttle position sensor (TPS) output**, allowing for seamless integration with modern engine management systems, ECUs, or standalone controllers. This ensures that the throttle body can be easily incorporated into both stock and modified setups without requiring extensive wiring or calibration adjustments.

For applications where **performance tuning and customization** are key, the AFE Power 46-39105 offers **adjustable throttle stop screws**, enabling precise tuning of idle speed, wide-open throttle (WOT) response, and overall throttle progression. This level of adjustability is particularly beneficial for engines running **turbochargers, superchargers, or nitrous oxide systems**, where throttle response must be finely calibrated to prevent stumbling or excessive surge. Additionally, the throttle body is designed with **easy-access mounting points**, featuring **stainless steel hardware** to prevent corrosion and ensure long-term reliability, even in harsh environments.

Beyond its mechanical and functional attributes, the AFE Power 46-39105 is built to withstand the demands of high-performance driving, featuring **reinforced gaskets** and **high-temperature seals** that prevent leaks and maintain a consistent vacuum or pressure relationship with the engine s intake manifold. The **smooth, polished interior surfaces** of the throttle body further reduce airflow turbulence, contributing to improved engine efficiency and power delivery. Whether installed on a **high-revving V8, a turbocharged inline-six, or a naturally aspirated four-cylinder**, this throttle body is engineered to deliver **consistent, reliable performance** while enhancing throttle response, fuel economy, and overall drivability.

Ideal for both **DIY enthusiasts** and professional tuners, the AFE Power 46-39105 is a **drop-in replacement** for many OEM throttle bodies, making installation straightforward with minimal modifications required. Its **universal compatibility** with a range of engine displacements and fuel systems from **EFI to port-injected setups** ensures broad applicability across different vehicle platforms. Whether upgrading a **stock engine for daily driving** or fine-tuning a **high-performance race car**, this throttle body provides the **precision, durability, and performance** needed to push an engine to its limits while maintaining reliability. With AFE Power s reputation for **high-quality manufacturing and engineering excellence**, the 46-39105 is a trusted choice for those seeking a **superior throttle body solution** that delivers measurable improvements in power, responsiveness, and drivability.

**Pros and Cons of buying a Afe Power 46-39105 Fuel Injection Throttle Body**

The **Afe Power 46-39105** is a fuel-injected throttle body designed for small engines, particularly those in lawnmowers, pressure washers, and other outdoor power equipment. Below is a detailed breakdown of its advantages and disadvantages.

### **Pros**

1. **Improved Fuel Efficiency and Performance**

The throttle body integrates fuel injection, which provides a more precise and consistent fuel-air mixture compared to carburetors. This can lead to better engine performance, smoother operation, and improved fuel economy, especially under varying loads.

2. **Easier Cold Starts**

Fuel injection systems often feature electronic ignition and fuel priming mechanisms, making it easier for engines to start in cold or damp conditions. This is particularly useful for equipment stored outdoors where moisture and temperature fluctuations are common.

3. **Reduced Emissions**

Modern fuel-injected systems are generally cleaner than carbureted ones, producing fewer harmful emissions. This can be beneficial if you operate equipment in areas with strict emissions regulations or if you prioritize environmental considerations.

4. **Durability and Longevity**

Afe Power products are known for their robust construction, often featuring high-quality materials such as aluminum or reinforced plastics. The throttle body is designed to withstand the stresses of frequent use, reducing the likelihood of leaks or mechanical failure over time.

5. **Compatibility with Electronic Controls**

Many fuel-injected throttle bodies come with electronic throttle control (ETC) or speed control features, allowing for easier adjustment of engine speed via remote or digital interfaces. This is useful for equipment like pressure washers or generators where consistent speed is critical.

6. **Reduced Carbon Buildup**

Carburetors are prone to clogging from carbon deposits, which can degrade performance over time. Fuel injection minimizes this issue by delivering cleaner fuel directly to the combustion chamber, reducing the need for frequent carburetor cleaning or replacement.

7. **Backward Compatibility with Some Engines**

While this throttle body is designed for specific applications, Afe Power often ensures compatibility with a range of small engines, particularly those manufactured by brands like Honda, Briggs & Stratton, or Kawasaki. Always verify compatibility with your engine model before purchasing.

8. **Easier Maintenance Compared to Carburetors**

Fuel-injected systems typically require less frequent tuning and adjustment than carburetors. While maintenance is still necessary, the overall upkeep can be simpler, especially for non-technical users.

---

### **Cons**

1. **Higher Upfront Cost**

Fuel-injected throttle bodies are significantly more expensive than traditional carburetors. The initial investment may be a barrier for budget-conscious buyers, especially if the engine is older or less valuable.

2. **Complexity of Installation**

Installing a fuel-injected throttle body often requires more technical skill than replacing a carburetor. It may involve wiring electrical components, adjusting fuel lines, and ensuring proper calibration. Users without mechanical experience may need to hire a professional, adding to the cost.

3. **Potential for Electrical Issues**

Fuel injection relies on electronic components, which can fail due to power surges, moisture, or wear. If the throttle body or associated wiring develops faults, diagnosing and repairing electrical issues can be challenging and time-consuming.

4. **Limited Availability of Parts and Support**

While Afe Power is a reputable brand, fuel-injected components may not be as widely available as carburetors. Finding replacement parts or technical support could be more difficult, particularly for older or less common engine models.

5. **Risk of Fuel System Contamination**

Fuel injection systems are sensitive to fuel quality. Poor-quality fuel or contaminants (such as water or debris) can clog injectors or damage the throttle body over time. Regular fuel system maintenance is essential to prevent costly repairs.

6. **Not Always a Direct Drop-In Replacement**

Some engines may require modifications to accommodate a fuel-injected throttle body, such as rerouting fuel lines or adjusting ignition timing. This can add complexity to the installation process and may void warranties if not done correctly.

7. **Potential for Overkill on Small Engines**

For very basic or low-performance engines (e.g., older lawnmowers or small generators), the benefits of fuel injection may not justify the cost. In such cases, a well-maintained carburetor might suffice and be more cost-effective.

8. **Learning Curve for Users**

Operating and maintaining a fuel-injected engine can be less intuitive for users accustomed to carbureted systems. Understanding how to adjust fuel maps, monitor diagnostics, or troubleshoot electronic issues may require additional time and effort.

---

### **Conclusion**

The **Afe Power 46-39105 fuel-injected throttle body** offers significant advantages in terms of performance, fuel efficiency, and ease of use for modern small engines. Its durability, reduced emissions, and compatibility with electronic controls make it a strong choice for those upgrading older equipment or investing in long-term reliability.

However, the higher cost, complexity of installation, and potential for electrical or fuel-related issues should be carefully considered. If you prioritize performance, environmental benefits, and long-term maintenance savings, this throttle body is a worthwhile investment. Conversely, if you operate simple, low-use equipment or lack mechanical experience, a carburetor upgrade or professional installation may be more practical.

### **Recommendation**

- You own a modern or high-performance small engine (e.g., Honda GX series, Kawasaki FP series, or Briggs & Stratton Intek).

- You frequently use the equipment in varying conditions (cold starts, high altitudes, or variable loads).

- You are willing to invest in long-term reliability and efficiency, even if the upfront cost is higher.

- You have access to basic mechanical skills or are prepared to seek professional assistance for installation.

- Your engine is very old or low-performance, and the benefits of fuel injection are minimal.

- You lack experience with electronic engine components and are uncomfortable with installation or troubleshooting.

- The cost exceeds your budget, and you can achieve similar results with a carburetor upgrade or maintenance.

- You cannot guarantee access to quality fuel or proper maintenance to prevent contamination issues.

For most users upgrading from a carburetor to a fuel-injected system, the **Afe Power 46-39105 is a strong, reliable choice** provided you are prepared for the higher cost and potential learning curve. Always verify compatibility with your specific engine model and consult the manufacturer s guidelines before purchasing.

Details:

Direct Bolt-On For Simple Installation.. Billet Aluminum Adapter. Finish: Natural.

Material: Cast Aluminum.: This aFe POWER 80mm Throttle Body and adapter kit improves engine air flow over the stock 74mm throttle body. A new larger couplet at the throttle body is recommended for easier installation couplet.D. No Tuning required.

More Power and Better Throttle Response. Mounting Hardware Included: Yes. Color: Natural. All needed hardware is included with the kit.

It is recommended to install this throttle body kit with an aFe cold air intake. Gaskets Included: Yes. The Serrated/Swirl combination design creates intake turbulence in the combustion chamber which breaks up fuel creating a more complete cycle increasing horsepower, torque and improving throttle response. All adapters are constructed from 6061-T6 billet aluminum and precision machined for light weight, high strength, perfect fit finish.

AFe Power 46-39105 Fuel Injection Throttle Body. Harness, Hardware and Gasket Included. Plug-n-play Electronics. The extra air flow will increase horsepower and throttle response.

part #: 4639105 prices

• $447.52-$475.29

specifications carfuelinjector:

• brand: Afe Power
• mpn: 46-39105
• type: Truck Car
• item length: 8.300
• item height: 8.200
• country of origin: Us
• upc: 802959410394

shipping carfuelinjector:

• service: Standard
• cost: $0.00
• transit: 4-7 Days
• class: Standard
• type: Fixed

returns carfuelinjector:

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

payments carfuelinjector:

• other
• credit card: Diners-club
• wallet: Google-pay

general carfuelinjector:

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

offer carfuelinjector:

• quantity: 5
• options: Ship-to-home
• started: February 6, 2026
• availability: In Stock
• sold: 0

seller carfuelinjector:

• # reviews: 45486
• city: Saint Paul, Minnesota
• rating: 98.3%

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