When you have purchased a Mazda 6 cold air intake for your vehicle, you might want to consider putting on a full Mazda 6 cat back exhaust as well. Mazda 6 Cold air intake system directs more cool air into the combustion chamber, in result, the fuel burns better with colder condensed oxygen. With all these exhaust gases exiting the motor, The exhaust flow is highly restricted by the Mazda 6 catalytic converter and factory Mazda 6 cat back exhaust that created much back-pressure. Installing Mazda 6 performance exhaust system will help to reduce back-pressure dramatically from bigger piping diameter & straighter pipe design. You can find the best Mazda 6 exhaust from our online catalog. Discounted Mazda 6 exhaust systems are now offered with free shipping and way below MSRP.