OER Parts offers a wide selection of Dress Up Kits for your 1991 Mercury Cougar. OER Parts offers 1991 Mercury Cougar Valve Covers, 1991 Mercury Cougar Exhaust Manifolds, 1991 Mercury Cougar Intake Manifolds, 1991 Mercury Cougar Timing Covers, 1991 Mercury Cougar Water Pumps, 1991 Mercury Cougar Oil Pans, 1991 Mercury Cougar Custom Under Hood Mirrors, 1991 Mercury Cougar Radiator Support Show Panel, and more...