4.0 LITER. Cross over pipe gasket. Front. A component which prevents a leak or provides a Sealing surface at the Catalytic Converter. Crossover Pipe To Front Muffler. Exhaust Crossover Gasket. Exhaust Pipe Connector Gasket. Exhaust Pipe to Manifold Gasket. Gasket for Catalytic Converter System. and. Catalytic cnvrtr. CrossUNDER. Exhaust Connector. Exhaust Crossover. Manifold.