Nissan Altima 2.5L Exhaust Manifold with Catalytic Converter with Gaskets & Hardware Nissan Altima 2.5L Exhaust Manifold with Catalytic Converter Includes all hardware and gaskets as shown in photos Holes for 2 Oxygen Sensors (Two O2 Sensors) *Please check your vehicle* *You may need to purchase a plug* Direct replacement, exact-fit kit replaces the vehicle's factory installed exhaust manifold Leak-resistant for long-lasting performance