19331472 - Chevrolet Performance Large Port Bowtie Vortec Head - Complete - 225cc Intake Runner, 77cc Exhaust Runner, 65cc Chamber - Up To .530" Lift

19331472 Vortec Bow-Tie Large Port Cylinder Head, Complete
the most powerful, Vortec Bowtie cast-iron head within the Chevrolet Performance portfolio. This cast-iron head features bigger valves, a thicker deck surface, and the Chevrolet bowtie.

Cast-iron large runner cylinder heads o 66cc combustion chambers o 0.450" deck thickness o Hardened exhaust valve seats o Machined for 2.000"/1.550" valves o Maximum 0.530" valve lift (without modifications) o Straight spark plug design o No heat risers o Drilled and tapped for 7/16"-14 screw-in studs o Dual bolt patterns for Vortec and early style intake manifolds (early model P/N 10051103; Vortec intakes P/N 12366573, 12496820, 12496821, 12496822 or 12489371) o Use Dual pattern intake gasket P/N 19301685 for early model intakes and Vortec design intake manifolds o Dual bolt patterns for perimeter-style and center-bolt valve covers o Vortec intake manifold three-step torque specs: 2 lb.-ft.; 9 lb.-ft.; 11 lb.-ft. o Completely assembled, ready to bolt-on with Lightweight hollow stainless intake valves and sodium filled stainless exhaust valve with modern LS style Beehive valve springs and components o Improved air flow (281 cfm @ 0.600") o 225cc intake ports o 77cc exhaust ports o 65cc combustion chambers o Use Fel-Pro(R) P/N 1470 exhaust gasket (minor trimming may be necessary