Fits Vehicles: GM Performance Roller LS9 Cam Kit - LS/LQ 4.8/5.3/5.7/6.0/6.2 GM Performance LS9 Cam Cam Specs: 211/230 Lift .562"/.588" 122 LSA This Chevrolet Performance LS9 ZR1 Camshaft will work on all Gen III/IV engines with the included valvesprings. LS6 .560” Beehive Valvesprings Spring specs are 100 lbs @ 1.800", 285 lbs @ 1.240", and coil bind @ 1.150.” Quality: Unless noted otherwise, these are new aftermarket parts. They are manufactured to align with Original Equipment (OE) specifications and act as a direct replacement for the factory part, not as an upgrade or improvement. They will fit and function as the original factory part did. OE Number： 12638427/SP011-16/VS LS Hat Kit