Smartflow® aluminum manifolds are constructed from extruded material, machined, then anodized for corrosion protection. Many manifold sizes are stocked, however custom manifolds can be made to your specifications. Standard red and blue anodizing denotes supply and return for cooling water lines. Green, black, clear and gold anodized manifolds are available. Call for pricing and delivery. 3/4", 1", and 11/2" manifolds are equipped with dovetail locking channels, pre-drilled mounting holes, and screws for ease in pairing and installation.