aluminium casting 6-cylinder auto intake manifold 1.material:aluminum 2.finish:Polishing, sand blasting, heat treatment, aluminium casting ... 2.Advantage:Good quality 3.Service:OEM&ODM 4.Certificate:ISO/TS16949:2009,ISO14001:2004 aluminium 6-cylinder intake manifold ... quality of every product it manufactures. Feature 1.MaterialAluminum 2.Process Aluminum casting, sand casting, die casting, gravity ...