TSP .660" Lift Dual Valve Spring Kit

The Texas Speed & Performance SK007 .660" Lift Dual Spring Kit is engineered for 2014 and newer LT Gen 5 engines, including LT1, L83, L86, L84, L87, and L8T variants with 5.3L, 6.2L, and 6.6L displacements. This kit utilizes PAC Racing Gen 5 LT1-specific polished dual valve springs, renowned for their advanced technology and material composition, aimed at maximizing spring life and performance. The kit incorporates Texas Speed's proprietary spring development, tailored for the taller installed height requirement of the Gen 5 6.2L LT1 engine. This design ensures excellent valvetrain control, even with more aggressive hydraulic roller camshafts, providing superior durability and stability suitable for factory-style lifters. The springs are treated with PAC's nano-peening process, which increases residual stress for a tighter molecular bond, significantly reducing the risk of spring fatigue and failure. Included in the kit are PRC's patent-pending integrated valve seats and seals, simplifying installation and eliminating the possibility of mis-installation or seal damage. Also provided are titanium retainers. The kit utilizes GM factory valve stem locks, which are not included. The specified measurements for this kit are an installed height of 1.900", closed spring pressure of 160 lb. @ 1.900" Installed Height, and open spring pressure of 406 lb. @ .650" lift, with 425 lb. @ .700" lift. The recommended maximum spring lift is .660" with a coil bind height of 1.09". **Important Fitment Note:** This kit WILL NOT fit LT4 Engines.