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Message: <blockquote data-quote="Speedhunter" data-source="post: 2109794" data-attributes="member: 68961">I've collected some spring rates and lengths for the Gen 1 and Gen 2. Front Spring Rates: 2010 - 2014<ul> <li data-xf-list-type="ul">OEM 5.4L SuperCab: Approximately 560 lb/in per spring.</li> <li data-xf-list-type="ul">OEM 6.2L SuperCab: Approximately 594 lb/in per spring.</li> <li data-xf-list-type="ul">OEM 6.2L SuperCrew: Approximately 640 lb/in per spring.</li> <li data-xf-list-type="ul">Eibach Has a linear spring rate of approximately 650 lb/in. Engineered to provide a front lift of approximately 2.5 to 3 inches over the factory ride height.</li> </ul>The factory front coil springs for the 2010–2014 Ford F-150 SVT Raptor have an uncompressed (free) length of approximately 17.5 inches.Front Spring Rates: 2017 - 2018<ul> <li data-xf-list-type="ul">OEM About 533 lb/in across models.</li> <li data-xf-list-type="ul">Eibach Pro-Lift Front Springs rated at 583 lb/in, designed to provide an additional 2.5 inches of lift.</li> </ul>The factory front coil springs for the 2017–2018 Ford F-150 Raptor have an uncompressed (free) length of approximately 19.38 inches.</blockquote>