The intake manifolds feature a high-flow runner design to deliver improved power from idle to 6,500 rpm.
These cast-aluminum manifolds are pressure-tested for leaks.
Please Note Vortec Heads Only Have 8 Bolts that Hold the Intake On, 2 Bolts in Each Corner of the Intake, if your Intake has 12 Total Bolts then this Intake will not work.
Professional Installation Highly Recommended (No Instructions Included)