Upgrade your engine's breathing capabilities with the Manley Valve - Intake, Valve-GEN II 56.5mm HOLLOW. Designed for performance enthusiasts, this valve is crafted to enhance airflow, ensuring your engine operates at its best. Whether you're hitting the track or just looking for a boost in everyday driving, this valve is engineered to deliver.
This intake valve is designed with precision to optimize airflow and improve engine efficiency. The hollow design reduces weight without compromising strength, which is crucial for high-performance applications. With its custom specifications, this valve fits seamlessly into your engine setup, ensuring a perfect match for enhanced performance.
The Manley Valve 11274H-1 features a head diameter of 2.300 inches, an overall length of 5.610 inches, and a stem diameter of 0.3133 inches. Its unique underhead angle of 12 degrees and radius of 3/8 inches make it suitable for various engine configurations, particularly in domestic automotive applications.
This valve is designed with a universal fitment in mind, making it compatible with a variety of vehicles. However, we recommend that customers conduct their own research to ensure compatibility with their specific engine setup. This diligence will help confirm that the Manley Valve is the right choice for your vehicle.
Customers have praised the Manley Valve for its performance improvements and reliability. Many have noted noticeable enhancements in throttle response and overall engine performance after installation. Users appreciate the precision engineering that Manley is known for, making this valve a trusted choice for performance upgrades.
This product comes with a Prop 65 warning label, indicating it may contain chemicals known to the state of California to cause cancer and reproductive harm. Please review the warning label for more information.
Don't miss out on the chance to enhance your engine's performance with the Manley Valve - Intake, Valve-GEN II 56.5mm HOLLOW. Upgrade today and feel the difference in your vehicle's performance!
⚠ 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.