Amazon.com: Dixon 4" Female Coupler w/150# ASA Flange Bauer Style, Galvanized, Type B (FC3144) : Industrial & Scientific
Amazon.com: Vibrant Power 2898G Gasket, Turbocharger Oil Drain, 2-bolt style, use with Vibrant Oil Drain Flange PN 2898, 2849 and 2850, each : Automotive