The Manley Valve Lock/Keeper, model LOC-5/16 STAMPED, is an essential component designed to ensure the secure operation of your engine's valve system. Perfectly suited for a variety of domestic automotive applications, this product is crafted to meet the rigorous demands of performance enthusiasts and everyday drivers alike.
The Manley Valve Lock/Keeper, part number 13238-16, is engineered for optimal performance. Here are some critical specifications:
By choosing the Manley Valve Lock/Keeper, you're opting for reliability and performance. This product helps maintain the proper alignment and function of your engine valves, ensuring smooth operation and longevity. Its robust construction means it can withstand the rigors of high-performance applications, making it a favorite among both casual drivers and racing enthusiasts.
The LOC-5/16 STAMPED is designed for a universal fitment, making it a versatile choice for many domestic vehicles. However, it's always a good idea to double-check compatibility with your specific engine setup to ensure a perfect fit. This proactive approach will save you time and guarantee that you get the best performance out of your vehicle.
Customers have praised the Manley Valve Lock/Keeper for its reliability and ease of installation. Many users have noted significant improvements in valve stability and performance, making it a highly recommended component for anyone looking to enhance their engine's functionality. Here’s what some satisfied customers have to say:
Universal Fitment: While these valve locks are designed for universal fitment, we recommend doing your research to confirm compatibility with your specific vehicle model. This will ensure that you get the best possible performance from your new valve locks.
⚠ 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.