Provide vehicle details to confirm fitment.
Internal ceramic honeycomb structure substrates contain ample metal catalysts and offer a larger surface area to fully react.
2002-2004 Nissan Altima Base Sedan 4-Door 2.5L
2006 Nissan Altima Base Sedan 4-Door 2.5L
2002-2006 Nissan Altima S Sedan 4-Door 2.5L
2002-2006 Nissan Altima SL Sedan 4-Door 2.5L
Professional installation would be highly recommended