Chevrolet Performance 19417888 - LSX-SC CNC Machined Cylinder Head (Assembled)

• Made of T356 aluminum with low-pressure casting and Hot Isostatic Pressing for enhanced strength and material density • CNC-machined intake and exhaust ports • CNC-machined combustion chambers • Includes valve seats and valve guides installed • Valve seats and guides designed to accommodate 2.20" (intake) and 1.61". (exhaust) valves • Assembled head includes 2.20" intake and 1.61" valves and beehive-type valve springs (including retainers and keepers) installed