Add to Cart Compare Chevrolet Performance LT1 CNC Aluminum Cylinder Head Assembly 19329839 CHEVROLET PERFORMANCE MSRP: Now: $947.38 Was: Chevrolet Performance LT CNC Aluminum Cylinder Head Assembly 19329839 Fully assembled 2.130" Intake / 1.590" Exhaust Valves. Heads are sold individually. 19329839 MSRP: Now: $947.38 Was: Add to Cart Compare