The Manley Valve Spring Seat, specifically the SPRING-ID Locator for part number 221431, is designed to provide reliable performance for your engine. This essential component ensures that your valve springs are properly seated, enhancing the overall efficiency of your vehicle's engine system.
This valve spring seat is crafted to ensure consistent performance, reducing the risk of valve float and improving overall engine reliability. Its robust construction means it can withstand the rigors of high-performance applications, making it an ideal choice for both daily drivers and race vehicles.
The 42431-16 part is compatible with various domestic vehicles, making it a versatile option for many engine setups. To ensure it fits your specific vehicle, we recommend checking your engine specifications and consulting with a trusted mechanic if needed. This proactive approach helps confirm that the Manley Valve Spring Seat will work seamlessly with your engine.
Feedback from users highlights the reliability and performance of the Manley Valve Spring Seat. Customers appreciate its easy installation and the noticeable improvement in engine performance. Many have reported a reduction in valve noise and enhanced stability during high RPM operation, making it a popular choice among automotive enthusiasts.
This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, please refer to the Prop 65 warning label.
With the Manley Valve Spring Seat, SPRING-ID Locator for 221431, you can trust that you're investing in a product that prioritizes quality and performance. Whether you're upgrading your vehicle for better performance or maintaining it for longevity, this valve spring seat is a smart choice for any automotive enthusiast.
⚠ 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.