
Manley 5/16in Viton Valve Seals .420in - Product Overview
If you're looking to enhance your engine's reliability and performance, the Manley 5/16in Viton Valve Seals .420in are a must-have. Designed to work seamlessly with NexTek triple valve springs, these seals provide an essential upgrade for your vehicle's engine setup.
Key Features
- Compatibility: Perfectly suited for use with NexTek triple valve springs, ensuring optimal performance.
- Special Design: Crafted to allow clearance within small inner diameter (I.D.) springs, making installation a breeze.
- Valve Size: Designed for 5/16" / 8mm valves, fitting a wide range of applications.
- Quantity: Each pack contains 8 pieces, providing everything you need for a complete setup.
- Guide O.D.: The outer diameter measures .420", ensuring a precise fit.
- Installed Seal O.D.: With an installed seal outer diameter of .566", these seals maintain a tight seal for optimal performance.
- Compatible Cutter: Use with Cutter No: 41510 for easy installation.
Specifications
- Part Number: 24040-8
- Material: Viton, known for its durability and resistance to high temperatures and chemicals.
Fitment Information
The Manley 24040-8 valve seals are specifically designed for various vehicle applications, particularly where 5/16" / 8mm valves are used. These seals ensure that your engine runs smoothly and efficiently, providing peace of mind whether you're on the track or the road.
Customer Reviews
Customers who have used the Manley 24040-8 valve seals praise their reliability and performance. Many have noted significant improvements in engine operation and a reduction in oil consumption. Here’s what some users have said:
- "These seals fit perfectly with my NexTek springs, and I noticed a difference in performance right away!"
- "Installation was straightforward using Cutter No: 41510. Highly recommend for anyone looking to upgrade their valve seals."
- "Great quality! The Viton material holds up well under pressure and heat."
Conclusion
Choosing the Manley 5/16in Viton Valve Seals .420in means investing in quality and performance. With their specific design for NexTek triple valve springs and robust construction, these seals are perfect for any serious automotive enthusiast looking to maintain their engine's integrity.
⚠ 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.
Sale price | None |
Wholesale price | $24.20 |
Shipping |
Weight: 1.00 Length: 8 Width: 5 Height: 1 |
Product Added At | Friday 24 July, 2020 |
Product Modified At | Friday 11 July, 2025 |
Imported By | ETLOverride |
Last Edited By | vendordata@vividracing.com |
View In Admin |
Vendor | Inv | Cost | Retail | Jobber | MAP | Core | Updated | |||
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Meyer Distributing | $20.51 | $23.87 | $16.38 | ? | ? | 2025-07-11 04:09:53 |
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