Discover Ford Crown Victoria Catalytic Converter Exhaust Leak & Ford Crown Victoria Exhaust Converters Replacement Cost. Maintaining the catalytic converter of your Ford Crown Victoria is crucial for optimal performance and longevity. To extend its lifespan, ensure regular engine maintenance to prevent excessive emissions and potential clogging. Watch for signs like reduced engine performance, increased emissions, and a sulfur-like smell indicating a need for replacement. When selecting a new converter, choose between universal, direct-fit, or high-flow options, each offering unique benefits to meet specific performance requirements. High-quality materials and correct installation are paramount to ensure efficiency and durability. With the right choice and care, you can enhance your vehicle's emissions system, contributing to both environmental health and your Crown Victoria's enduring performance.