The Manley Valve - Exhaust, Valve-S/D 1.600, +.100, .3136 STEM is designed for automotive enthusiasts who demand the best for their engines. This valve is engineered to enhance engine performance, ensuring optimal airflow and efficiency. Whether you're upgrading your vehicle for racing or simply improving its overall functionality, this valve is a solid choice.
This exhaust valve is designed to fit a variety of applications, making it a versatile choice for your engine. With its precise engineering, you can expect improved exhaust flow, which translates to better engine performance and efficiency. The durable construction ensures that it can withstand the rigors of high-performance driving, making it a reliable component for your setup.
While this valve is designed to be universal, we recommend conducting thorough research to ensure compatibility with your specific vehicle. The Manley Valve is suitable for various applications, but confirming fitment will help you avoid any surprises during installation.
Many customers have praised the Manley Exhaust Valve for its quality and performance. Users have noted significant improvements in their vehicle’s responsiveness and power output after installation. Here's what some of them have said:
If you're looking to enhance your vehicle's performance, the Manley Exhaust Valve - 12337-1 is an excellent investment. Its robust specifications and positive customer feedback make it a trusted choice for serious automotive enthusiasts.
⚠ 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.