AMC 290 304 360 390 401 Edelbrock Performer Intake Manifold # ED2131Intake Manifold, Performer, Dual Plane, Aluminum, Natural, Square Bore Flange, AMC, 304, 360, 390, 401, Each Intake Section Included: Complete Engine Block Deck Height: Standard deck Carburetor Quantity: One Intake Style: Dual plane Basic Operating RPM Range: Idle 5,500 Intake Manifold Height: 4. 850 in. Intake Finish: Natural Intake Material: Aluminum EGR: No Quantity: Sold individually. Notes: Will not accept Motorcraft spread bore carburetor. Will