These 2.5L high-flow front catalytic converters from YITAMOTOR are compatible with 2002-2006 Nissan Altima/Sentra.certifications:OBD I , OBD-II , Federal EPA , Non-CARB, material:Stainless steel, restricted states:California, new york, colorado, maine, fitment type:Direct replacement, dimensions:18.5 in. overall length, inlet type:Single (5-bolt welded flange), outlet type:Single (2-bolt welded flange), connection type:2 bolt, connection type:5 bolt, oxygen sensor location:Pre & post catalyst, oxygen sensor ports:2, substrate:Ceramic, placement on vehicle:Front, other part number:16456,753002, 751195, 58142, 641198, interchange part number:0961456, 0961400, 674659, 641320, 641519, 101400, manufacturer part number:S08o09121, warranty:5 years or 50,000 miles limited