1. ATTENTION: This item doesn't ship to California & Colorado & New York, please confirm before purchase.\r 2. VEHICLE FITMENT: Compatible with 2002 2003 2004 2005 2006 Altima 2.5L. Please check the product description page below for more references.\r 3. Dcertifications:OBD I , OBD-II , Federal EPA , Non-CARB, material:Stainless steel, restricted states:California, New York, Colorado , Maine, fitment type:Direct replacement, connection type:2 bolt, substrate:Ceramic, placement on vehicle:Front & Rear, interchange part number:0991401, 324202, 642280, other part number:54360, 40514, 88140, 58140, manufacturer part number:Y01O09043, warranty:5 years or 50,000 miles limited