Kelford Beehive Valve Spring & Retainer KitFord Gen 2 Ecoboost 3. 5L V6 Ecoboost. High performance, progressively wound PACALOY beehive valve spring with retainers. This kit was engineered to go with high performance camshaft upgrades and high boost applications. 90lb seat pressure @ 43. 0mm Installed height 246lb @ 13mm lift Coil bind is at 25. 0mm
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