3.5 EcoBoost V6 Beehive Valve Springs. High performance, progressively wound PACALOY­­™ beehive valve spring with titanium retainers. This kit was engineered to match our camshafts for ultimate quality, performance and reliability. 90lb seat pressure @ 36.5mm Installed height / 193lb @ 11mm lift / Coil bind is at 23.6mm.