Product Details of Catalytic Converter Exhaust Manifold for Nissan Altima1.High precious metal load and high technology washcoat for premium performance.2.Stainless steel construction, ,internal substrate material and precious metal loading have been carefully engineered for maximum efficiency and to avoid "MIL" code issues that are common with lower quality products.3.Federal Emissions compliant design.4.EPA Approved;5.TWG products are covered by 25,000-miles catalytic performance & 50,000-miles structural integrity warranty.Catalytic Converter Exhaust Manifold for Nissan AltimaCatalytic converters are usually used with internal combustion engines fueled by either petrol (gasoline) or diesel.Manufacturer Part Number: 674-659 , RI19590Interchange Part Number:40810, 641169, 1195,NIS2527, NIS2534Fits the following vehicles:Fitment2002 2003 2004 nissan altima Base Sedan 4-Door/S Sedan 4-Door/SL Sedan 4-Door 2.5L2002 2003 2004 2005 Nissan Sentra SE-R Spec V Sedan 4-D/SE-R Sedan 4-Door 2.5L2003 Nissan Sentra Limited Edition Sedan 4-Door 2.5L2004 Nissan Sentra S Sedan 4-Door/LE Sedan 4-Door 2.5LFeature of Direct Fit Catalytic Converter for Wrangler 4.0LCeramic catalyst cores are typically wrapped in mounting mats made of ceramic fibers and packaged into steel housings. Specially developed materials and technologies allow the design and construction of extremely durable catalytic converters. A number of converter canning technologies were developed, including clamshell, tourniquet and stuffing. In each of the technologies, the converter shell geometry has to provide the required mounting density for the mat. The design of converter inlet and outlet headers or cones affects the gas flow distribution and pressure drop. In applications with space limitations, catalysts can be placed inside catalytic mufflers.Workshop