MANLEY 11687-8 Extreme Exhaust Valves Stem 807298051147 1.610 8MM 0.3136

( Brand: Manley ), ( Manufacturer Part Number: 11687-8 ), ( Part Type: Valve Exhaust ), ( UPC: 807298051147 )

Review MANLEY Extreme Duty Exhaust Valves 1.610 Diameter 8mm Stem fits LS7 610

The Manley 11687-8 Extreme Exhaust Valves are a high-performance upgrade for LS7 engines with a 1.610 inches (40.9 mm) stroke and 8mm (0.3136 inches) stem diameter. These valves are designed for applications that demand exceptional durability, reliability, and maximum flow under extreme conditions.

Manufactured from high-strength, heat-treated stainless steel, these exhaust valves offer superior strength and resistance to thermal fatigue and pitting. Each valve undergoes a meticulous manufacturing process, including precision machining, grinding, and lapping, to ensure a perfect fit and smooth operation.

These Manley valves feature a large 1.610 inches (40.9 mm) diameter, which allows for increased flow and reduced backpressure, resulting in improved engine performance and efficiency. The 8mm (0.3136 inches) stem diameter is specifically designed to fit LS7 engines and provides a solid connection to the engine components.

The valve stems are finished with a hard-anodized coating, which provides additional protection against corrosion and wear. The valve seats are made from Manley's proprietary high-performance Ceramic Coated Composite (CCC) material, which offers superior sealing and durability.

These Manley Extreme Exhaust Valves are suitable for high-performance applications, such as racing, high-horsepower builds, and heavy-duty use. They offer exceptional durability, reliability, and performance, making them an excellent choice for those seeking the best possible results from their LS7 engine.

In summary, the Manley 11687-8 Extreme Exhaust Valves are a high-performance upgrade for LS7 engines with a 1.610 inches (40.9 mm) stroke and 8mm (0.3136 inches) stem diameter. They are manufactured from high-strength stainless steel, offer increased flow, and provide superior durability and reliability for demanding applications.

Manley 11687-8 Extreme Exhaust Valves for LS7 engines are aftermarket performance parts designed to provide improved airflow and durability compared to OEM valves. Here are some potential pros and cons of buying these valves for your LS7 engine:

1. Enhanced Performance: Manley Extreme Exhaust Valves are designed to provide increased flow capacity, which can lead to better engine performance and power gains.

2. Durability: These valves are made from high-quality materials, such as stainless steel and titanium, which can help improve their lifespan compared to OEM valves.

3. Improved Thermal Efficiency: The design of these valves can help improve thermal efficiency by reducing heat transfer between the valves and cylinder heads.

4. Customizability: Manley offers these valves in various sizes and stem lengths, allowing you to choose the best option for your specific engine build.

1. Cost: Aftermarket performance parts like these Manley valves can be more expensive than OEM parts.

2. Installation Complexity: Installing aftermarket exhaust valves can be a complex process, requiring specialized tools and expertise.

3. Potential Compatibility Issues: It is essential to ensure that the aftermarket valves are compatible with your engine and other components, as using incompatible parts can lead to issues.

Manley 11687-8 Extreme Exhaust Valves offer several potential benefits, such as improved performance, durability, and thermal efficiency. However, they also come with some drawbacks, such as cost, installation complexity, and potential compatibility issues. Ultimately, whether these valves are worth the investment for your LS7 engine depends on your specific goals, budget, and expertise. If you are looking for significant performance gains and are willing to invest in high-quality aftermarket parts, then these valves could be an excellent choice. However, if you are on a tight budget or are not confident in your installation abilities, then it might be best to stick with OEM valves.

Details:

American Express.

part #: 116878 prices

• $202.55-$520.60

specifications voomvalve:

• for models: Ls7, 610
• brand: Manley
• mpn: 11687-8
• part type: Valve Exhaust
• upc: 807298051147

seller voomvalve:

• # reviews: 609110
• city: , Ohio
• rating: 98.8%

offer voomvalve:

• sold: 0
• started: December 13, 2025
• options: Ship-to-home
• availability: In Stock
• quantity: 10

shipping voomvalve:

• type: Fixed
• cost: $0.00
• transit: 10-17 Days
• class: Standard
• service: Standard

payments voomvalve:

• other
• wallet: Google-pay
• credit card: Mastercard

general voomvalve:

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

returns voomvalve:

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

Manley 11687-8 Is Similar To:

• Manley 11782-8 Sbm R m 2.020in Intake Valves (39.7% similar) Swirl polished and fully machined: the valves feature swirl polished under head areas fully machined combustion faces to optimize airflow efficiency. Material: stainless. Chrome stems and hard tips: stems hard tips are incorporated for enhanced longevity wear resistance. Type: intake...(July 12th, 2024)
• Manley Performance 10728-8 6 Street Master Flo 2.190ftft Intake Valves For Bb Chevy (41.3% similar) Missing 2 of the valves. Manley 10728-8 street master Flo 2.190'' intake valves for BB Chevy, opened box...(July 22nd, 2024)
• Manley 11834-1 Severe Duty Valve (45.9% similar) American express...(August 15th, 2024)
• Manley 11591-8 Valve Exhaust Valve-fd Svo 1.880 (54% similar) Today, Manley manufactures crankshafts, connecting rods, pistons, push rods, rocker arms, valve springs, lash caps, guide plates, and many other oem high performance components. About the brand: Manley performance products have been tearing up streets and tracks worldwide since 1966 . Unleash your...(August 18th, 2024)
• Manley 42301-8 42301 8 11 32 Valve Stem Cap (40% similar) For kits, photo might show entire kit and listing is only for one component. Note: photos do not always represent the actual product. Manley 42301-8 11/32 valve stem cap,:: lash cap - 0.080 in thick stems minimum 0.250 tip non-rotating steel natural set of...(August 21st, 2024)
• Manley Performance 11621-8 For Chevy Ls-3 l-99 L-92 Head Small Block Race Master Exhaust Valves (39.5% similar) Since that time Manley has continued to evolve, using the knowledge they have gained since beginning and building on continue bring best engine components market...(August 26th, 2024)
• Manley A861-2 2 A861 Exhaust Engine Valve For Continental 124 140 162 209 (40% similar) They may have been in storage anywhere from 1-30 years. Or any other minor issue that does not make the part you are buying defective. Once purchased you own it. If any manufacturer warranty exists, it is between you and them. These items, although new, are not always crispy clean like...(August 28th, 2024)
• Manley A1585-4 4 A1585 Engine Exhaust Valve For 1965-1983 Ford 170 200 250-l6 (44.2% similar) 170, 2/2 50 6CYL. Sometimes the fitment is so old that it does not take into account trim, engine size or build dates. Ford, ford trek. They may have been in storage anywhere from 1-30 years. Manley part number A1585-4. If any manufacturer warranty exists, it is between you and them...(August 28th, 2024)
• Manley 42125-8 Standard Wear Caps For 0.3130 Inch 8mm Stem Valves (30.6% similar) Manley standard wear caps for 0.3130 - 8MM stem valves 42125-8,: caps: thru-hardened 4140 alloy steel: special heat treatment to HR 50-54: specifications...(August 28th, 2024)
• Manley Performance 42139-8 Standard 310 Inch Stem Valves 7.87mm Wear Caps 8 Pack (38% similar) Manley valve tip wear caps protect the of your stem in high-rpm engines. Stem DIAMETER.080 in. They are constructed from 4140 heat-treated alloy steel, strong enough to handle harsh racing conditions. Thick, standard type, set of 8, Manley .310IN stem valves 7.87MM wear caps 8 PCs, features...(August 28th, 2024)
• Manley 10577-1 Budget Performance Exhaust Valve (43.5% similar) American express...(September 2nd, 2024)