EngineQuest CH364XA Assembled Cylinder Head for GM LS 6.0L 6.2L LS3 L92 LQ4GM LS 364X Cylinder Head Assembled Cylinder Head Assembled 2. 165 1. 570 in Valves 246 cc Intake 69 cc Chamber Aluminum GM LS Series Each Out of the box, bolt on performance Engineered to be modified from stock to high performance with ease Works with applications of 4 bore & larger Upgraded 6 bolt block capability 15 valve angle with LS3 1. 7 rocker ratio Accepts stock LS3 valve train parts Integrated rocker support towers, MUST use LS7 rocker bolts