Precision machined from 6061-T6 billet aluminum;Serrated/Helix Combination Design for optimum airflow into the combustion chamber;Includes all hardware;Will not fit when used in conjunction with the Stage 2 intake system (P/N 51/54-10092) on a 6.0L equipped truck. Please use a Stage 1 system (P/N 51/54-10091) in this case.;This product is 50-state legal (CARB E.O Number D-550-11)

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