Single Plane EFI Intake Manifold w/ Fuel Rails for GM Gen III IV LS LS1/LS2/LS6 90855647OE Number 300 137 534 219 HH6313S HH0862S HH6449RS Will fit Following Models Fitment: GM Gen III or Gen IV LS engines with LS1 LS2 LS6 cylinder heads Features: Optimized runner layout and constant cross sectional area broad torque curve. Minimum carb flange height fits most vehicles with minimum hood modifications. Cast aluminum construction great manifold for LS swaps, centrifugal blower, turbocharged or NOS power adder applications. Efficient