Aluminum Dual Plane Air Gap Intake Manifold For Small Block Chevy 262-400 1955-1986 38081955RPM Air Gap Intake Manifold: Fits: 1955 1986 Small Block Chevy 262 4004 barrel Square Bore Carb FlangeIntake Style: Dual planeBasic Operating RPM Range: 1,500 6,500Intake Manifold Height: 4. 720 in. Intake Finish: NaturalIntake Material: AluminumEGR: No Manifold Features: SATIN Aluminum finish180 dual plane high rise design for outstanding power from 1500 to 6500 RPMCast in bosses on intake runners, can be drilled and tapped for nitrous