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Replace the faulty or old stock catalytic converter with the all new aFe power direct-fit cat replacement for the 1997-1999 jeep wrangler (TJ) with i6-4.0l Engine. This cat replacement is constructed of mandrel-bent, 100% MIG welded stainless steel for strength and durability. This unit comes with a 49-state federal approved cat and a 3/8" thick flange for a secure hassle-free installation. This cat replacement is designed as a one piece system that retains the factory o2 sensor and hanger locations for a direct bolt-on and go solution. Stainless steel construction: this system is constructed of durable mandrel bent stainless steel tubing for maximum performance, corrosion resistance and strength, eliminating cracking. Factory mounting locations: this direct fit cat replacement retains factory 02 sensor and mounting locations. This unit also comes with an OE-style flange making it a true bolt-on system. Catalytic converter: this kit comes with a 49-state federal approved catalytic converter. aFe headers and exhaust are engineered and manufactured in our corona, California manufacturing facility. Note: this system is not currently carb exempt and is not available for sale in California or for use on any vehicle registered with the California department of motor vehicle.