DICMIC 2701 Engine Dual Plane Intake Manifold Compatible with 1955-1986 Chevy 305 327 350 383 Small Block V8 Engine. [REPLACE PART NUMBER] 2701. [FEATURE] The aluminum satin intake manifold are dual-plane with two smaller plenums receive air from the carburetor or throttle body resulting in a higher velocity through the booster making the engine more responsive to the driver.