This American Thunder® Cat-back system is designed for the 2005-2012 Toyota Tacoma with 4.0L engine. The system is constructed entirely of 409S stainless steel for long-lasting durability. The 2.50 in. mandrel bent system connects to the back of the factory catalytic converter assembly using the supplied flanged inlet pipe. It then flows into a Super 50™ Series performance muffler and exits into dual 2.50 in. stainless steel tailpipes, which exit on both sides of the vehicle behind the rear tires. The tailpipes are finished off with large 3.00 in. polished stainless tips embossed with the Flowmaster® logo. As an American Thunder system, it provides improved horsepower and torque along with a moderate performance sound level both inside and outside of the vehicle. Includes instructions and all necessary hardware for an easy bolt-on installation you can do at home and is covered by our Lifetime Limited Warranty. Note: Does NOT fit standard cab or X-Runner models.