MANLEY 11683-1 Extreme Exhaust Valve 1.600 8MM

( Brand: Manley ), ( Manufacturer Part Number: 11683-1 ), ( Part Type: Valve Exhaust )

Review MANLEY Extreme Duty Exhaust Valve 1.600 Diameter 8mm fits LS1 LS2 LS6 600

The Manley 11683-1 Extreme Exhaust Valve is a high-performance aftermarket solution designed specifically for the LS1, LS2, and LS6 engines, which come with a 1.600 inches (40.64 cm) cylinder bore size and utilize 8mm exhaust valve stems. This valve is an essential upgrade for enthusiasts seeking improved engine performance, durability, and reliability.

This Manley valve is manufactured using the advanced techniques and materials, including 356 Aluminum alloy for the valve body and stainless steel for the valve stems. This combination offers excellent heat dissipation, durability, and reduced weight compared to the factory valves.

The Manley Extreme Exhaust Valve features a unique design with a fully machined valve seat, ensuring a perfect seal and minimal leakage. The valve's asymmetrical shape is optimized for better flow and reduced turbulence, resulting in enhanced power output and improved engine efficiency. The valve also has a larger diameter compared to stock valves, allowing for increased exhaust flow and more efficient scavenging.

The valve's 8mm exhaust valve stems are designed to work seamlessly with aftermarket performance exhaust headers and systems, offering a more significant flow path and reducing backpressure. The valve also comes with Manley's proprietary valve springs, ensuring reliable valve function under high RPM and boosted conditions.

The Manley 11683-1 Extreme Exhaust Valve is an excellent choice for enthusiasts looking to extract maximum performance from their LS1, LS2, or LS6 engine. Its high-quality construction, innovative design, and improved flow characteristics make it an essential upgrade for those seeking a more powerful, efficient, and reliable engine.

Manley 11683-1 Extreme Exhaust Valves are aftermarket performance parts designed for LS1, LS2, and LS6 engines with a 1.600 inch (40.64 cm) exhaust port and 8mm stem. These valves offer several potential benefits and drawbacks.

1. Enhanced Performance: Manley Extreme Exhaust Valves are designed to improve engine performance by providing better flow and durability compared to stock valves. They are made of high-quality materials, such as stainless steel, and are available in various sizes to suit different engine configurations.

2. Increased Longevity: These aftermarket valves are built to last longer than stock parts, which can help reduce the need for frequent valve replacements and save you money in the long run.

3. Improved Thermal Efficiency: Manley Extreme Exhaust Valves are designed to improve thermal efficiency by reducing heat transfer between the cylinder head and the exhaust gases. This can help improve engine performance and reduce the risk of thermal damage.

1. Cost: Aftermarket performance parts like the Manley Extreme Exhaust Valves can be more expensive than stock parts. While the initial investment may be higher, the potential benefits and increased durability may make it a worthwhile investment for some enthusiasts.

2. Installation Complexity: Installing aftermarket exhaust valves can be a more complex process than replacing stock parts. It may require specialized tools and a higher level of mechanical expertise.

3. Potential for Increased Noise: Some enthusiasts may find that aftermarket exhaust valves produce more noise than stock parts. This can be a desirable feature for those looking for a more aggressive exhaust note, but it may not be ideal for those who prefer a quieter driving experience.

The Manley 11683-1 Extreme Exhaust Valves offer several potential benefits for LS1, LS2, and LS6 engine enthusiasts, including improved performance, increased longevity, and better thermal efficiency. However, they come with some drawbacks, such as a higher cost, increased installation complexity, and potential for increased noise. Ultimately, the decision to purchase these aftermarket valves depends on your individual goals and preferences as a car enthusiast. If you are looking for enhanced performance and durability, and are willing to invest in the installation process, then the Manley Extreme Exhaust Valves may be a worthwhile investment. Alternatively, if you prioritize a quieter driving experience or have a limited budget, then stock valves may be a better option for you.

Details:

American Express.

part #: 116831 price

• $563.90

specifications voomvalve:

• for models: Ls1, Ls2, Ls6, 600
• brand: Manley
• mpn: 11683-1
• part type: Valve Exhaust

offer voomvalve:

• sold: 0
• quantity: 10
• started: January 31, 2026
• options: Ship-to-home
• availability: In Stock

payments voomvalve:

• wallet: Apple-pay
• credit card: Visa
• other

seller voomvalve:

• city: , Ohio
• # reviews: 614660
• rating: 99.1%

returns voomvalve:

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

general voomvalve:

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

shipping voomvalve:

• service: Standard
• transit: 9-14 Days
• type: Fixed
• cost: $15.99
• class: Standard

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