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Manley NexTek Street/Strip .580 Lift Valve Springs Ford 4.6/5.4L SOHC 2V



Model #221427-16

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Manley Performance has brought its trademarked NexTek valve spring technology to the Chevy LS, Ford Modular, and Chrysler SB HEMI markets. Manufactured from "super clean" Hi-tensile strength chrome silicon steel alloy, these springs offer winning performance, long term reliability and the ultimate value. Manleys proprietary multi-step heat-treating combined with their shot peening process minimizes load loss and offers superior fatigue life.

Computer-aided modeling of application specific designs has enabled Manley to bring the very best springs to these niche markets. Theyve utilized ovate wire extensively with many conical designs to render the lightest, highest quality, most reliable springs available today; as well as adding a special polishing feature that helps further improve the fatigue life of the part.

  • Outer Diameter : 1.020/1.125"
  • Inner Diameter : .642/.748"
  • Installed Pressure : 95 @ 1.680"
  • Open Pressure : 240 @ 1.130"
  • Max Lift : .580"
  • Coil Bind : 1.080
  • Spring Rate: 264 (lbs/in)

Other Part Numbers:
Manley #man221427-16

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Vehicle Engine Notes
Ford Crown Victoria

Ford Explorer

1997, 2004
Ford F-150

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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