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Manley NexTek Street/Strip .660 Lift Valve Springs Chevrolet LS-Series
$291.29
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Manley NexTek Street/Strip .660 Lift Valve Springs for Chevrolet LS-Series

If you're looking to boost your Chevy LS engine's performance, the Manley NexTek Street/Strip .660 Lift Valve Springs (part number 221436-16) are a fantastic choice. Designed specifically for the Chevrolet LS-Series, these valve springs are engineered to deliver exceptional performance and reliability on the street or the strip.

Key Features

  • Material: Crafted from "super clean" Hi-tensile strength chrome silicon steel alloy, ensuring durability and long-lasting performance.
  • Heat Treatment: Manley's proprietary multi-step heat-treating process minimizes load loss and enhances fatigue life.
  • Ovate Wire Design: Utilizing ovate wire and conical designs, these springs are among the lightest and most reliable available.
  • Polishing Feature: A special polishing process further improves the fatigue life of each spring.

Specifications

  • Outer Diameter: 1.295"
  • Inner Diameter: .676"
  • Installed Pressure: 155 lbs @ 1.810"
  • Open Pressure: 405 lbs @ 1.150"
  • Max Lift: .660"
  • Coil Bind: 1.100"
  • Spring Rate: 379 lbs/in

Fitment Information

The Manley NexTek 221436-16 valve springs are specifically designed for use in Chevrolet LS engines, making them an ideal upgrade for enthusiasts looking to enhance their engine's capabilities. Whether you're building a performance street machine or a dedicated race car, these springs will help you achieve optimal valve control at high RPMs.

Customer Reviews

Customers have praised the Manley NexTek valve springs for their reliability and performance. Many have noted the noticeable improvements in their engine's responsiveness and power delivery. Here are a few highlights from trusted reviews:

  • "These springs are a game changer for my LS build. I noticed a significant increase in power!"
  • "Installation was straightforward, and the quality is top-notch. Highly recommend!"
  • "Great value for the performance you get. They hold up under pressure."

Upgrade your Chevrolet LS engine with the Manley NexTek Street/Strip .660 Lift Valve Springs and experience the difference in performance and reliability!

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Vehicle
2004-2007, 2009-2013
Cadillac CTS-V
1998-2002, 2010-2013
Chevrolet Camaro
1997-2013
Chevrolet Corvette
2001-2004, 2006-2013
Chevrolet Corvette Z06
2009-2013
Chevrolet Corvette ZR1
1993-2002
Pontiac Firebird
2008-2009
Pontiac G8
2004-2006
Pontiac GTO

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How did Manley Performance Start?

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 Space

Led 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 Racing

If 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.

Due to the intended usage of the products sold by Manley Performance Products, Inc., they are sold WITHOUT WARRANTY OR ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR THE INTENDED PURPOSE. Manley Performance Products, Inc. shall not, under any circumstances, be liable for any special, consequential or incidental damages, including but not limited to loss of profits or revenue, loss of other property or equipment, cost of purchased or replacement of goods, or claims by customers of the purchaser, which may arise and/or result from the sale, installation or use of these parts. Installation of parts intended for “off-highway” use could adversely affect the vehicle manufacturer’s warranty coverage. Subject to applicable state law. Some items may not be legal for use in California on pollution controlled vehicles. All weights specified are approximate and subject to manufacturing tolerances. Manley Performance Products, Inc. reserves the right to make changes in design, specifications, materials, or make product changes without incurring liability or obligation with respect to similar product previously manufactured. If technical advice is offered or given in connection with the use of any Products it will be as an accommodation to Buyer and without charge and Seller shall have no responsibilities or liabilities whatsoever for the content or use of such advice.

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