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 • 66cc combustion chambers • 0.450" deck thickness • Hardened exhaust valve seats • Machined for 2.000"/1.550" valves • Maximum 0.530" valve lift (without modifications) • Straight spark plug design • No heat risers • Drilled and tapped for 7/16"-14 screw-in studs • 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) • Use Dual pattern intake gasket P/N 19301685 for early model intakes and Vortec design intake manifolds • Dual bolt patterns for perimeter-style and center-bolt valve covers • Vortec intake manifold three-step torque specs: 2 lb.-ft.; 9 lb.-ft.; 11 lb.-ft. • 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 • Improved air flow (281 cfm @ 0.600") • 225cc intake ports • 77cc exhaust ports • 65cc combustion chambers • Use Fel-Pro® P/N 1470 exhaust gasket (minor trimming may be necessary
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