If you're looking to boost your engine's efficiency, the Manley Valve - Intake, Valve-R/F 2.050, .3133 STEM is a fantastic option. Designed specifically for high-performance applications, this valve is perfect for those who want to enhance their vehicle's intake system. Whether you're hitting the racetrack or just want to get the most out of your ride, this valve has you covered.
This intake valve is engineered for optimal flow and durability, making it an excellent choice for performance enthusiasts. The design allows for increased airflow, which can lead to improved throttle response and overall engine performance. Its robust construction means it can withstand the rigors of high-performance driving, ensuring longevity and reliability.
The Manley Valve 12304-8 is designed to fit a variety of vehicles and engines, but it's essential to verify compatibility with your specific setup. While this valve is universal in nature, we recommend doing a bit of research to ensure it aligns perfectly with your vehicle's requirements. This proactive approach will help you avoid any fitment issues down the line.
Customers have praised the Manley Valve for its high-quality build and noticeable performance improvements. Many users report enhanced acceleration and smoother engine operation after installation. A few highlights from customer feedback include:
Universal Fitment: While the Manley Valve is designed for broad compatibility, we recommend confirming fitment with your specific vehicle model. Doing your due diligence will ensure you get the best performance out of your new valve.
⚠ 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.