If you're looking to boost your engine's efficiency, the Manley Valve - Intake, Valve-GEN II 48mm is an excellent choice. Designed for automotive enthusiasts, this intake valve is engineered to deliver optimal performance for a variety of applications.
This valve is crafted to enhance airflow, which can lead to improved throttle response and overall engine performance. Its custom specifications allow for a perfect fit and function, making it a reliable choice for your vehicle's needs.
The Manley Valve 11246-8 fits a range of vehicles, ensuring that you can find the right application for your engine. Here are the specifications:
This valve is designed for universal fitment, but we recommend that you double-check your vehicle specifications to ensure compatibility. Proper research will help confirm that this valve is the right choice for your engine.
Customers have praised the Manley Valve for its quality and performance. Many have noted noticeable improvements in engine responsiveness and efficiency after installation. Here’s what some users have said:
“After installing the Manley intake valve, my engine feels more alive! The throttle response is sharper, and I can definitely feel the difference.”
“Great product! Easy to install and works perfectly with my setup. Highly recommend it to anyone looking to upgrade their valves.”
Universal Fitment: While this valve is designed for a variety of applications, it's essential to verify its compatibility with your specific vehicle model to ensure optimal 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.