To generate power, the engine in your Toyota FJ Cruiser must consume gas. In the process of burning it, noxious fume are produced. The many parts of your factory exhaust work together to remove them, safeguarding you, your passengers, and the environment to boot. First, your catalytic converter, or cat, captures, contains, and converts most of those toxins into harmless carbon dioxide and water vapor. Secondly, your exhaust manifold collects and transfers the result through an exhaust pipe; your resonator and muffler help air move properly in the meantime while lessening engine noise. Finally, your tail pipe disperses the cleaner vapors into the air, where they disintegrate. When should you replace the exhaust parts in your Toyota FJ Cruiser, and how often? That depends on where you drive and in what conditions. Catalytic converters can last 100,000 miles, but mufflers and resonators last as few as 2 to 4 years. A better way to determine the answer is by looking for signs of exhaust problems. Go further than a Check Engine light. Look for weird exhaust pipe or muffler noises, rotten egg smells, and diminishing fuel economy. If you see them, do a thorough inspection. If your exhaust is to blame, don't worry. You can buy the best replacement Toyota FJ Cruiser exhaust parts possible right here online, at our parts store. We carry only the genuine article, which are guaranteed right from your OEM to be compatible with your SUV. Order now and save!