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Upgrading vehicle's exhaust system is a great way to build horsepower, free up trapped torque, and improve upon restrictive factory systems. The larger pipes, low-restriction mufflers, and tuned resonators of a well-designed performance exhaust system can make a world of difference on your vehicle. The net result is lower auto exhaust backpressure, more horsepower, more torque, and a much better sound. Note: This product is for competition racetrack use only. all other uses are contrary to federal law. if you intend this product for highway or non-competition racetrack off-road purposes do not purchase or install this product.