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