Product Details of catalytic converter for nissan Altima 2.5L 2002-20061.Easy Install-OE-style routing and hanger position for easy installation.2.Thick OE-style flanges, , hangers and brackets for enhanced strength.3.Flange to flange, direct fit design bolts to existing exhaust.4.Designed for use on OBDII (1996 and newer) vehicles.5.Federal Emissions compliant design.6.EPA Approved ;7.TWG products are covered by 25,000-miles catalytic performance & 50,000-miles structural integrity warranty.Catalytic converter for nissan Altima 2.5L 2002-2006A catalytic converter is an exhaust emission control device that converts toxic gases and pollutants in exhaust gas from an internal combustion engine into less-toxic pollutants by catalyzing a redox reaction (an oxidation and a reduction reaction).Fits the following vehicles:FitmentNissan Altima SL Sedan 4-Door 2.5L 2002-2006Nissan Altima S Sedan 4-Door 2.5L 2002-2006Nissan Altima Base Sedan 4-Door 2.5L 2002-2006Nissan Sentra SE-R Spec V Sedan 4-Door 2.5L 2002-2006Nissan Sentra SE-R Sedan 4-Door 2.5L 2002-2006Feature of Direct Fit Catalytic Converter for Wrangler 4.0L Ceramic 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