Cast aluminum high flow inlet (or charge pipe) elbow tube. 3" OD with beaded ends for proper hose clamping. Polished and machined for of this tube has been successfully used on 500HP turbo applications. Unit is cas with boss for misc. nipple fitting tap. Unit is designed to flow like a 3" pipe but has an ovalized area to dodge tight spots in the engine bay. Flow volume is uniform throughout the ID.