If you are trying to maximize the power out of your vehicle, nothing can be neglected or left to chance. In terms of intakes and exhaust, Advanced Flow Engineering is one of the best companies out there. AFE has a complete line of air intakes, and they also have a number of exhaust products. Exhaust and intake are all about airflow, and airflow is AFE's specialty. An AFE down pipe is a great way to augment your exhaust system. The four inch mandrel bent tubing of an AFE down pipe ensures that you will have the best possible airflow through the exhaust without suffering any power-robbing restrictions. The AFE down pipe can give you power gains of about five horsepower, which may not sound like much, but five horsepower here and five horsepower there add up to significant power gains. Because it is made by AFE, you can be confident that the AFE down pipe is dyno tested to ensure reliability and performance, and you know that it will be a fantastic upgrade to your vehicle. The AFE down pipe is primarily intended for the line of large-bore diesel exhaust systems produced by AFE, although there may be an AFE down pipe for other applications. Auto parts buyers are entitled to professional customer service while looking at quality auto parts from us. That's why we make available an always-online technical help call bureau to answer all your calls. To make a good deal even better, there is free shipping for all orders $50 or higher. If you find a better price, let us know - we will meet or beat any advertised price for auto parts.