Feature:1. Applicable Models: Vortec dual plane intake manifold is designed for SBC replacement for CHEVY SMALL BLOCK Dual Plane 350 383 1997 up.2. OEM Number: Replacing manufacturer part number for reference is DM 3202H. Please make sure the OE number matches the part you are replacing.3. Idle To 6500 RPM: The intake manifold replacement features a high flow runner design to deliver improved power from idle to 6,500 rpm.4. Clear HEI Ignition: Dual plane intake manifold will effectively clear HEI ignition systems, it is the perfect performance to upgrade your engine.5. Aluminum Construction: Intake manifold is constructed of high strength cast aluminum, anti rust, wearproof, sturdy and durable, not easy to deformation.Specification:Item Type: Intake Manifold Vortec Dual PlaneMaterial: Cast AluminumOEM: DM 3202HIncluding The Water Inlet Part: CompleteEngine Block Style: OEM StandardIntake Mode: Double PlaneOptimum Working Speed Range: Idle Speed 6500Intake Manifold Height: 4.5inIntake Surface Treatment: NaturalIntake Material: AluminumEGR: NoApplicable Models: Fit for SBC replacement for CHEVY SMALL BLOCK Dual Plane 350 383 1997 up.Package List:1 xIntake Manifold Vortec Dual PlaneNote:1. Please double check the part number of your item, matching information is for reference only.2. If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks!