If you're looking to optimize your engine's performance, the Manley 1.550 Spring Cups are a fantastic choice. Designed specifically for high-performance applications, these spring cups ensure a precise fit and reliable function for your engine's valve springs.
These spring cups are engineered to provide a snug fit for your valve springs, which is crucial for maintaining optimal engine performance. The CNC machining process ensures that each cup is crafted with precision, reducing the risk of failure under high-stress conditions. Plus, the heat-treated black oxide finish not only enhances durability but also offers protection against corrosion.
The Manley 1.550 Spring Cups (42330-16) feature a robust design with a wall thickness of 0.062 inches, ensuring they can withstand the rigors of performance applications. Their precise dimensions make them an ideal choice for various engine setups, particularly those utilizing Manley springs like the 221432 and 221441P.
These spring cups are specifically designed to fit a range of performance engines that require a 1.550-inch outer diameter spring. They are perfect for enthusiasts looking to upgrade their valve spring setup for improved performance and reliability.
Customers have praised the Manley 1.550 Spring Cups for their exceptional quality and fit. Many users noted that the installation was straightforward, and they experienced noticeable improvements in engine response and performance. The durability of the heat-treated finish has also been highlighted, with users reporting that these cups withstand the demands of high-performance applications without issue.
Upgrade your engine's reliability and performance with the Manley 1.550 Spring Cups (42330-16) – a trusted choice among 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.