OER Parts offers a wide selection of Dress Up Kits for your 1978 Dodge Diplomat. OER Parts offers 1978 Dodge Diplomat Valve Covers, 1978 Dodge Diplomat Exhaust Manifolds, 1978 Dodge Diplomat Intake Manifolds, 1978 Dodge Diplomat Timing Covers, 1978 Dodge Diplomat Water Pumps, 1978 Dodge Diplomat Oil Pans, 1978 Dodge Diplomat Custom Under Hood Mirrors, 1978 Dodge Diplomat Radiator Support Show Panel, and more...