Manley Intake Valves SBC R/F 1.840 (Part Number: 11506-8)
When it comes to enhancing your Small Block Chevrolet engine, the Manley Intake Valves SBC R/F 1.840 are a top-notch choice. Designed specifically for high-performance applications, these valves offer a perfect blend of durability and efficiency, ensuring your engine runs at its best.
Key Features
- Material: Crafted from NK-842 stainless steel, these valves provide exceptional strength and corrosion resistance.
- Surface Finish: Swirl polished for improved airflow and reduced turbulence.
- Machining: Fully machined to ensure precise fitment and optimal performance.
- Stems: Chrome stems with hard tips for enhanced durability and wear resistance.
- Flow Design: Features "Pro Flo" underhead design for increased flow, maximizing engine efficiency.
- Vehicle Compatibility: Specifically designed for Small Block Chevrolet engines.
Benefits of Manley Intake Valves
These intake valves are engineered to boost your engine's performance by allowing for better airflow and combustion efficiency. The swirl polished finish and unique underhead design significantly enhance the intake flow, making them ideal for both street and race applications. Whether you're rebuilding your engine or upgrading for more power, these valves will fit seamlessly into your setup.
Specifications
- Part Number: 11506-8
- Valve Diameter: 1.840 inches
- Application: Small Block Chevrolet
Customer Reviews
Customers have praised the Manley Intake Valves for their fit and finish, noting how easy they are to install and the noticeable improvements in engine performance. Many have reported smoother acceleration and better throttle response after upgrading to these valves. Here’s what some users have said:
- "These valves made a huge difference in my engine's performance. Highly recommend!"
- "The quality is top-notch, and they fit perfectly in my SBC."
- "I noticed a significant improvement in airflow. Great investment for any performance build!"
Fitment
The Manley Intake Valves 11506-8 are specifically designed for Small Block Chevrolet engines, making them a perfect match for various applications. Whether you're working on a classic car or a modern build, these valves will integrate seamlessly, providing you with the reliability and performance you need.
Upgrade your engine with the Manley Intake Valves SBC R/F 1.840 and experience the difference in performance and reliability. Your Small Block Chevrolet deserves the best!
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Manley Performance, formerly called Manley Speed Equipment, was established in 1966 by Hank Manley shortly after his graduation from Brown University. His interest in the performance and racing traced back to 1960 when, at age 17, he rebuilt a 312 CID Ford V8 engine, installed a camshaft and three two-barrel carbs, and raced a ’56 Thunderbird on New Jersey’s streets. Initially, the company’s product lineup included stainless valves, lifters, camshafts, forged pistons, vanadium valve springs, pushrods, and timing chain kits. By 1998, Manley had outgrown its first Bloomfield, New Jersey facility and bought several acres in Lakewood, New Jersey. It was around this time that the brand’s name formally changed to Manley Performance. Nearly a decade later, the production space doubled in size.
Evolving in the Automotive SpaceLed by GM Michael Tokarchik in 2002, Manley entered the high-performance passenger car market as an OEM supplier of connecting rods for the 2003/2004 Ford SVT Mustang Cobra. Production reached 2500 rods per week without missing a single delivery date. Ford awarded Manley its highest ever supplier rating. Manley’s presence in the OEM market continued from there as a supplier for the Ford GT. After nearly 50 years since its inception, Manley continues to be globally recognized as the leading manufacturer of performance valves, connecting rods, cylinder head components, pushrods, drive and oil systems, and several other engine parts.
What is Manley’s Specialty?Manley Performance specializes in high-performance engine internals that range from stock replacements to full-on race applications. They have been the standard of the industry since their inception; a fact that still remains true now as they have ventured into new markets. Today, Manley Performance continues to re-define itself in a high-performance aftermarket industry that is constantly evolving. The brand has developed a wide range of new products for growing markets that include sport compact, Ford modular, and Chevy LS. Manley also maintains its leadership role with the traditional V8 engine business.
Get Manley Performance at Vivid RacingIf you are in need of a serious upgrade to your engine, then Manley Performance parts should be on your list. Like all of our suggested manufacturers, Manley uses the best materials available to ensure a quality part for your engine. We carry Manley connecting rods, crankshafts, pistons, and valve components. The large lineup of domestic parts includes sport compact vehicles, Ford modular engines, GM’s LS series internals, and HEMI product upgrades for Chrysler.
If you can’t find what you’re looking for or need help choosing the right part for your car, call our sales team at (480) 966-3040. We are here to make your buying experience a breeze.
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