MANLEY 11688H-8 Severe Pro Flo Intake Valves Hollow Stem 807298069753 Design 2.205

( Brand: Manley ), ( Manufacturer Part Number: 11688H-8 ), ( Part Type: Intake Valve ), ( UPC: 807298069753 )

Review MANLEY Severe Duty Pro Flo Intake Valves Hollow Stem Design 2.205 fits LS7

Introducing the Manley 11688H-8 Severe Duty PRO Flo Intake Valves, specifically designed for the LS7 engine. These high-performance intake valves are engineered to deliver optimal airflow and power gains for demanding applications.

The Manley 11688H-8 intake valves feature a hollow stem design, which reduces weight and increases rigidity, ensuring precise valve control and improved engine response. The valves are made from premium 351 stainless steel, providing superior strength and durability.

The Severe Duty PRO Flo design of these intake valves includes a unique float-type valve spring retainer that maintains consistent valve spring pressure throughout the RPM range, ensuring consistent power delivery and optimal engine performance. The valves also come with titanium retainers, which offer lighter weight and reduced friction compared to traditional steel retainers, leading to improved valve control and reduced engine wear.

These intake valves are designed to work seamlessly with high-performance engines and aftermarket components, such as high-lift camshafts and high-flow intake manifolds. With a diameter of 2.205 inches and a stem length of 1.685 inches, these valves are a direct fit for LS7 engines and require no modification for installation.

In summary, the Manley 11688H-8 Severe Duty PRO Flo Intake Valves offer significant power gains and improved engine response for LS7 engines. With their hollow stem design, premium stainless steel construction, Severe Duty PRO Flo spring retainer, and lightweight titanium retainers, these valves provide unmatched strength, rigidity, and durability. Upgrade your LS7 engine with these high-performance intake valves and experience the difference in power and performance.

Manley 11688H-8 Severe Duty PRO Flo Intake Valves for LS7: A Detailed Analysis

The Manley 11688H-8 Severe Duty PRO Flo Intake Valves for LS7 are aftermarket intake valves designed to enhance the performance of your LS7 engine. These hollow stem design valves offer several benefits, but they also come with some drawbacks. Let's delve into the pros and cons to help you make an informed decision.

1. Enhanced Durability: Manley's severe duty design ensures these intake valves can withstand the rigors of high-performance applications. They are made of heat-treated stainless steel and feature reinforced seats for added strength.

2. Improved Airflow: The hollow stem design reduces the weight of the valve, allowing it to open and close more quickly, which can lead to increased airflow and better engine breathing.

3. Increased Longevity: By using aftermarket intake valves, you can potentially extend the life of your engine by replacing worn-out or damaged original valves.

4. Customizability: Manley offers various intake valve options that cater to different racing applications, such as high-lift, race, and street performance valves.

1. Cost: Aftermarket intake valves like the Manley 11688H-8 can be quite expensive compared to OEM valves. This may not be an issue for serious racers or high-performance enthusiasts but could be a deterrent for others.

2. Installation Complexity: Installing aftermarket intake valves can be a more involved process than swapping out stock valves. It may require specialized tools, engine disassembly, and professional expertise.

3. Potential Clearance Issues: Depending on the specific engine configuration and aftermarket components used, clearance issues may arise, which could necessitate additional modifications or custom parts.

The Manley 11688H-8 Severe Duty PRO Flo Intake Valves for LS7 offer several advantages, including enhanced durability, improved airflow, increased longevity, and customizability. However, they also come with some drawbacks, such as higher cost, installation complexity, and potential clearance issues.

If you are a serious racer or high-performance enthusiast seeking maximum engine performance and longevity, the benefits of these aftermarket intake valves may outweigh the downsides. However, if you are a casual driver or have a limited budget, the added complexity and cost may not be worth it.

If you are considering purchasing the Manley 11688H-8 Severe Duty PRO Flo Intake Valves for your LS7 engine, carefully consider the pros and cons and weigh them against your specific needs and budget. Consult with a professional mechanic or engine builder to help you make an informed decision and ensure a successful installation.

Details:

American Express.

part #: 11688h8 prices

• $301.07-$330.64

specifications voomvalve:

• for models: Ls7
• brand: Manley
• mpn: 11688h-8
• part type: Intake Valve
• upc: 807298069753

general voomvalve:

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

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• type: Fixed

seller voomvalve:

• rating: 99.1%
• # reviews: 616476
• city: , Ohio

offer voomvalve:

• options: Ship-to-home
• availability: In Stock
• started: February 14, 2026
• quantity: 2
• sold: 0

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