Outside Diameter (Small End): 1.055. Spring Rate (lbs/inch): 313 lbs/in. Product Representation: Actual parts may vary based on configuration ordered. No single race engine component is more critical than valve springs.Lunati##x2019;s new Signature Series Valve Springs deliver maximum performance plus reliability, for round after round winning in pro or sportsman drag racing. Signature Series springs feature finest quality, chrome silicone, steel alloy spring wire, carefully inspected and cleaned to eliminate dirt and foreign matter. Each spring is precision wound to exact print specs, micro-shot peened, to relieve surface stress risers, and carefully heat treated, for reduced tension loss. Selected Lunati Signature Series springs are also nitride processed, for added valve lift loading and increased spring life. These premium quality valve springs are absolutely the finest available for any drag racing application. Signature Series springs are available in a variety of designs and outside diameters to suit any engine application. Included are: Single Springs, with flat internal dampers in 1.260##x201D; OD; Dual Springs with and without dampers, from 1.300##x201D; to 1.625##x201D; OD; and Triple Springs, in 1.645##x201D; to 1.725##x201D; O. Signature Series valve springs are also available in ##x201C;Beehive##x201D; design. These are made from a unique ovate shaped, multi-arch wire that places additional material on the inner diameter of the spring, for greater tension and spring life. The item "Lunati Voodoo Hemi Mopar. 600 Lift 1.290 Ovate Beehive Valve Springs #74815-16" is in sale since Sunday, April 21, 2019. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Engines & Components\Valves & Parts". The seller is "speedliquidators" and is located in Memphis, Tennessee. This item can be shipped worldwide.