MANLEY 99012-1 Twincam Race Master Intake Valves

( Brand: Manley ), ( Manufacturer Part Number: 99012-1 ), ( Type: Cylinder Head )

Review MANLEY Harley davidson Twincam Race Master Gen Intake Valves

The Manley 99012-1 Harley-Davidson Twin Cam Race Master Gen Intake Valves are a premium aftermarket upgrade for Harley-Davidson V-Twin engines. These intake valves are designed to deliver exceptional performance, durability, and reliability for racing applications.

The Race Master Gen Intake Valves are crafted from high-strength 356 aluminum alloy, providing excellent heat dissipation and resistance to thermal fatigue. The valves feature Manley's exclusive "V-groove" design, which optimizes the flow of air and fuel into the cylinder head for maximum power output.

The intake valves also come with titanium valve springs, which offer superior strength and lightweight construction compared to traditional steel springs. This results in improved valve control and response, enabling the engine to breathe more efficiently and produce more power.

The Race Master Gen Intake Valves are designed to fit Harley-Davidson Twin Cam engines with factory-style intake ports, making installation straightforward and hassle-free. They come with new valve guides and seats, ensuring a precise fit and seal.

These intake valves are also finished with a hard anodized coating, which provides superior protection against corrosion and wear. The coating also gives the valves a distinctive appearance, adding a touch of style to your engine.

In summary, the Manley 99012-1 Harley-Davidson Twin Cam Race Master Gen Intake Valves are a high-performance upgrade for Harley-Davidson V-Twin engines. With their superior strength, optimized flow design, lightweight titanium springs, and precise fitment, these intake valves offer improved power output, durability, and reliability for racing applications.

The Manley Harley-Davidson Twincam Race Master Gen Intake Valves are aftermarket intake valves designed to improve the performance of Harley-Davidson V-Twin engines. These valves are popular among Harley-Davidson enthusiasts and racers due to their high-performance characteristics. In this response, we'll discuss the pros and cons of buying these intake valves.

1. Enhanced Performance: Manley intake valves are designed to provide better flow and reduce restriction, which can lead to improved engine performance. This includes increased horsepower and torque.

2. Durability: Manley is a well-known manufacturer of high-performance engine components. These intake valves are made from high-quality materials and are designed to withstand the rigors of high-performance riding and racing.

3. Improved Throttle Response: The improved flow characteristics of these intake valves can lead to better throttle response, making the engine feel more responsive and quicker.

4. Customizable: These intake valves are available in various sizes and configurations to fit different Harley-Davidson engines.

1. Cost: Manley intake valves are more expensive than OEM (original equipment manufacturer) valves. This can be a significant investment for some Harley-Davidson owners.

2. Installation: Installing aftermarket intake valves can be a complex and time-consuming process. It may require specialized tools and expertise.

3. Potential for Engine Tuning: Installing high-performance intake valves can lead to an increase in engine output. This may require additional engine tuning to ensure proper functioning and to avoid potential engine damage.

The decision to buy Manley Harley-Davidson Twincam Race Master Gen Intake Valves depends on individual preferences and goals. If you're looking for improved engine performance, better throttle response, and increased durability, then these intake valves may be a worthwhile investment. However, they come with a higher cost and a more complex installation process compared to OEM valves. Ultimately, the decision should be based on your budget, technical expertise, and riding goals.

If you're serious about improving the performance of your Harley-Davidson engine and are willing to invest the time and money, then Manley Harley-Davidson Twincam Race Master Gen Intake Valves are a great choice. However, if you're on a tight budget or prefer a more straightforward upgrade, consider other performance modifications such as air filters, exhaust systems, or camshafts.

Details:

New in old box sitting on my parts shelves.

part #: 990121 prices

• $37.67-$199.99

specifications cylindermotorcycleiz:

• for makes: Harley, Davidson
• brand: Manley
• mpn: 99012-1
• type: Cylinder Head

general cylindermotorcycleiz:

• Motorcycle Scooter Parts Accessories > Engines Engine Parts > Cylinder Heads
• condition: New other see details

shipping cylindermotorcycleiz:

• type: Calculated
• service: USPS Ground Advantage
• carrier: USPS
• class: Standard
• transit: 5-10 Days
• cost: $14.90

seller cylindermotorcycleiz:

• city: Coatesville, Pennsylvania
• rating: 100.0%
• # reviews: 213

returns cylindermotorcycleiz:

• policy: No Returns

payments cylindermotorcycleiz:

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

offer cylindermotorcycleiz:

• sold: 0
• options: Ship-to-home
• best offers: True
• started: November 8, 2025
• availability: In Stock
• quantity: 1

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