WEBER WK551-34 Cj Performance Carburetor Conversion Kit Yj 4.2 258

( Brand: Weber ), ( Manufacturer Part Number: WK551-34 ), ( Choke Type: See Photos ), ( Type: Carburetor ), ( Material: Aluminum )

Review WEBER Jeep Cj Performance Carburetor Conversion Kit 4.2 258 Yj fits 1978-89

The Weber WK551-34 Jeep CJ Performance Carburetor Conversion Kit is specifically designed for Jeep CJ models with a 4.2 inline-six 258 engine from the years 1978 to 1989. This conversion kit is an excellent alternative to the stock carburetor, offering improved performance and better fuel economy.

The Weber WK551-34 kit comes with a 40-inch double-pumper carburetor, which is known for its superior air/fuel mixture control. The carburetor features a venturi size of 1.72 inches and a choke mechanism that ensures easy starting, even in cold weather conditions. The kit also includes a fuel bowl gasket, float bowls, needle jets, and an adjustable main jet.

The kit also includes a high-performance intake manifold, which is designed to provide better airflow and improve engine performance. The intake manifold is made from aluminum, making it lightweight and durable, and it features a smooth, polished finish.

The conversion process is relatively straightforward, with the kit providing all the necessary hardware for installation. The conversion process involves removing the stock carburetor, installing the new intake manifold, and then installing the new Weber carburetor. The kit also includes instructions to make the installation process as simple as possible.

The Weber WK551-34 Jeep CJ Performance Carburetor Conversion Kit is not just about performance; it also offers improved fuel economy. The kit's design allows for more efficient fuel delivery, meaning that less fuel is wasted, resulting in better fuel economy.

In summary, the Weber WK551-34 Jeep CJ Performance Carburetor Conversion Kit is an excellent upgrade for Jeep CJ owners with a 4.2 inline-six 258 engine. It offers improved performance, better fuel economy, and is a straightforward installation process. The kit comes with all the necessary components for installation and is backed by Weber's reputation for high-quality, reliable products.

Weber WK551-34 Jeep CJ Performance Carburetor Conversion Kit: A Detailed Analysis

The Weber WK551-34 Jeep CJ Performance Carburetor Conversion Kit is designed for 4.2L 258 YJ (1978-1989) models. This kit offers a significant upgrade to the stock carburetor, providing improved engine performance. In this analysis, we will discuss the pros and cons of investing in this conversion kit.

1. Enhanced Engine Performance: The Weber carburetor is renowned for its high-performance capabilities. This conversion kit can help increase horsepower, torque, and overall engine efficiency.

2. Superior Fuel-Air Mixture: The kit comes with a high-performance Weber carburetor that delivers a more precise fuel-air mixture, resulting in a smoother and more responsive engine.

3. Customizable: The conversion kit allows for customization, including adjustable jetting and idle mixtures, which can be fine-tuned to suit specific driving conditions and preferences.

4. Improved Throttle Response: The Weber carburetor offers quicker throttle response, resulting in better acceleration and overall driving experience.

5. Durable: Weber carburetors are known for their durability and long lifespan, making this an investment that can last for years.

1. Installation Complexity: Installing the conversion kit can be a complex process, requiring specialized tools and considerable mechanical expertise.

2. Cost: The conversion kit is more expensive than a stock carburetor, which may be a deterrent for some buyers.

3. Fuel Economy: Although the conversion kit can improve engine performance, it may also lead to slightly reduced fuel economy due to the increased power output.

The Weber WK551-34 Jeep CJ Performance Carburetor Conversion Kit offers several advantages, including enhanced engine performance, improved fuel-air mixture, customizable options, superior throttle response, and durability. However, it also comes with some drawbacks, such as installation complexity, higher cost, and potentially reduced fuel economy. Ultimately, the decision to invest in this conversion kit depends on your priorities and budget. If you are looking for a significant performance upgrade and are willing to invest the time and money, this kit could be an excellent choice. Otherwise, a stock carburetor may be a more suitable option.

If you are considering the Weber WK551-34 Jeep CJ Performance Carburetor Conversion Kit, make sure you have a solid understanding of the installation process and are willing to invest the time and resources required. Additionally, consider your budget and driving preferences to determine whether the potential performance benefits outweigh the costs and complexities. If you are confident in your abilities and are looking for a high-performance carburetor upgrade, this kit could be an excellent investment. Otherwise, a stock carburetor may be a more practical choice.

Details:

New never used, box is opened but used. See all photos for condition. Complete kit in great shape.

part #: wk55134 prices

• $149.99-$474.00

specifications carbcoon:

• for makes: Jeep
• for years: 1978-89
• brand: Weber
• mpn: Wk551-34
• choke type: See Photos
• type: Carburetor
• material: Aluminum

general carbcoon:

• condition: New other see details
• Car Truck Parts Accessories > Air Fuel Delivery > Carburetors

seller carbcoon:

• city: Homosassa Springs, Florida
• rating: 99.8%
• # reviews: 5662

returns carbcoon:

• policy: No Returns

shipping carbcoon:

• cost: $0.00
• service: FedEx Ground Economy
• type: Calculated
• class: Economy
• transit: 5-11 Days
• carrier: FedEx

offer carbcoon:

• started: January 2, 2026
• options: Ship-to-home
• sold: 0
• quantity: 1
• availability: In Stock

payments carbcoon:

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

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