Select the year of your Ford Crown Victoria:
Manley NexTek Street/Strip .580 Lift Valve Springs for Ford 4.6/5.4L SOHC 2V
If you're looking to boost your Ford 4.6 or 5.4L SOHC 2V engine's performance, the Manley NexTek Street/Strip .580 Lift Valve Springs are your go-to solution. Designed with precision and engineered for excellence, these valve springs are crafted to enhance your engine's capabilities while ensuring long-lasting reliability.
Key Features
- High-Quality Materials: Made from "super clean" hi-tensile strength chrome silicon steel alloy for unmatched durability.
- Advanced Technology: Incorporates Manley’s proprietary multi-step heat-treating process and shot peening to minimize load loss and extend fatigue life.
- Optimized Design: Features application-specific designs with computer-aided modeling, ensuring the springs meet the unique demands of your engine.
- Lightweight Construction: Utilizes ovate wire and conical designs to provide the lightest and most reliable springs available.
- Polished Finish: Special polishing enhances the fatigue life of the springs, giving you peace of mind on the road or track.
Specifications
- Outer Diameter: 1.020/1.125 inches
- Inner Diameter: 0.642/0.748 inches
- Installed Pressure: 95 lbs @ 1.680 inches
- Open Pressure: 240 lbs @ 1.130 inches
- Max Lift: 0.580 inches
- Coil Bind: 1.080 inches
- Spring Rate: 264 lbs/in
Fitment Information
The Manley NexTek .580 Lift Valve Springs (Part Number: 221427-16) are specifically designed for the Ford 4.6L and 5.4L SOHC 2V engines. These springs fit perfectly into your engine, ensuring optimal performance and reliability during high-stress situations, whether you’re on the street or the strip.
What Customers Are Saying
Customers have praised the Manley NexTek valve springs for their impressive performance and durability. Many have noted significant improvements in their engine's responsiveness and overall power delivery. Here are some highlights from trusted reviews:
- "These springs made a noticeable difference in my engine's performance. Highly recommend!"
- "Installation was straightforward, and the quality is top-notch. I've had no issues so far!"
- "Great value for the performance boost they provide. Worth every penny!"
Upgrade your Ford 4.6/5.4L SOHC 2V engine with the Manley NexTek Street/Strip .580 Lift Valve Springs and experience the difference in performance and reliability!
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
| Make Vehicle | Model | Year |
|---|---|---|
|
1998 Ford Crown Victoria |
Crown Victoria | 1998 |
|
1995 Ford Explorer |
Explorer | 1995 |
|
2004 Ford F-150 |
F-150 | 2004 |
|
1997 Ford F-150.5 |
F-150.5 | 1997 |

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.
Check out these other great products
