MANLEY 12339-8 Valve Exhaust Brodix 383 S/d 1.850

( Brand: Manley ), ( Manufacturer Part Number: 12339-8 ), ( Type: Engine Exhaust Valve ), ( Country/region Of Manufacture: China )

Review MANLEY Valve Exhaust bbc Brodix 383 S/d 1.850 fits 850

Introducing the Manley 12339-8 Exhaust Valve, meticulously engineered for applications using BBC (Brady Bunch Coaches) Brodix 383 Small Block Chevrolet engines with a 1.850-inch (47mm) exhaust valve stem diameter. This high-performance valve is a must-have upgrade for any serious hot rod or race engine build.

Manufactured by Manley Performance, a renowned name in the automotive industry, this exhaust valve is constructed from premium materials for unmatched durability and reliability. The valve body is made from heat-treated, 356 stainless steel, ensuring excellent strength and resistance to thermal fatigue. The stem and seats are made of nickel-chrome alloy, providing superior corrosion resistance and longevity.

The Manley 12339-8 exhaust valve features a unique full-port design, which maximizes exhaust flow and reduces backpressure, resulting in improved engine performance. The valve stem is machined to precise tolerances, allowing for a perfect fit and smooth operation. The valve seats are also precision-machined to ensure a tight seal and minimal exhaust leakage.

This exhaust valve is designed to meet the demands of high-performance applications, with a maximum operating temperature of 1,350 degrees Fahrenheit (732 degrees Celsius). The valve is also compatible with both unleaded and leaded fuel, making it an excellent choice for a wide range of engine builds.

Incorporating the latest technology, this exhaust valve is designed with a hollow stem that reduces weight and improves response, as well as a contoured stem shape that reduces turbulence and improves exhaust flow. The valve also features a narrow stem-to-seat design, which allows for a smaller combustion chamber and increased compression ratio.

The Manley 12339-8 exhaust valve is easy to install and comes with all necessary hardware, including stem nuts, guide plates, and valve springs. It is also available in a variety of spring rates to suit different engine configurations.

In summary, the Manley 12339-8 Exhaust Valve is a high-performance upgrade for BBC Brodix 383 Small Block Chevrolet engines with a 1.850-inch (47mm) exhaust valve stem diameter. Its superior construction, full-port design, and advanced features make it an ideal choice for any serious engine build.

The Manley 12339-8 valve exhaust valve is a popular choice for high-performance applications, particularly in engines like the BBC (Big Block Chevy) Brodix 383 Stroker Series 1.850. Here are some pros and cons that may help you make an informed decision about purchasing this valve:

1. Enhanced Performance: Manley valves are known for their superior performance and durability. This exhaust valve is no exception. It is designed to withstand high temperatures and pressures, making it an ideal choice for high-performance engines.

2. Precision-Machined: Manley valves are CNC machined from high-quality materials, ensuring a precise fit and excellent sealing properties. This results in better engine performance, increased efficiency, and reduced emissions.

3. Longer Valve Life: Manley valves are made from high-strength materials, such as stainless steel and titanium, which make them more resistant to wear and tear. This means they last longer than standard OEM valves, reducing the need for frequent replacements.

4. Improved Engine Sound: The Manley 12339-8 exhaust valve is designed to provide improved exhaust flow and scavenging, resulting in a more powerful and aggressive engine sound.

1. Higher Cost: Manley valves are more expensive than standard OEM valves. This may be a deterrent for some buyers who are working on a budget.

2. Installation Complexity: Installing a Manley valve may require more expertise and time than installing a standard OEM valve. This may add to the overall cost of the project.

The Manley 12339-8 exhaust valve is an excellent choice for high-performance applications in engines like the BBC Brodix 383 Stroker Series 1.850. Its superior performance, durability, and precision-machining make it a worthwhile investment for those who are serious about maximizing their engine's potential. While the valve may come with a higher cost and installation complexity, the benefits it provides in terms of performance and longevity make it a wise investment for those who value power and reliability.

If you are building a high-performance engine and are looking for a reliable and durable exhaust valve, the Manley 12339-8 valve is an excellent choice. Its superior sealing properties, durability, and precision-machining make it a worthwhile investment for those who value power and reliability. However, it may not be the best choice for those who are working on a tight budget or have limited expertise in engine building. If you fall into this category, you may want to consider a less expensive OEM valve or seek the help of a professional engine builder.

Details:

All accessories hardware. Placing an order outside the US is easy. Title: Manley Valve - Exhaust, Valve-BBC BRODIX 383 S/D 1.850. Manley 12339-8 Valve - Exhaust, Valve-BBC BRODIX 383 S/D 1.850: 1.850.

Type: Exhaust. Engine Exhaust Valve

Original packaging.

part #: 123398 prices

• $301.07-$339.60

specifications voomvalve:

• for models: 850
• brand: Manley
• mpn: 12339-8
• type: Engine Exhaust Valve
• country/region of manufacture: China

offer voomvalve:

• availability: In Stock
• options: Ship-to-home
• quantity: 2
• sold: 0
• started: August 1, 2025

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• wallet: Google-pay
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general voomvalve:

• condition: New
• Engines Engine Parts > Valvetrain Components > Valves

shipping voomvalve:

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

seller voomvalve:

• # reviews: 114310
• rating: 98.6%
• city: Jasper, Indiana

returns voomvalve:

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

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