When you have purchased a Smart cold air intake for your vehicle, you might want to consider putting on a full Smart cat back exhaust as well. Smart 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 Smart catalytic converter and factory Smart cat back exhaust that created much back-pressure. Installing Smart performance exhaust system will help to reduce back-pressure dramatically from bigger piping diameter & straighter pipe design. You can find the best Smart exhaust from our online catalog. Discounted Smart exhaust systems are now offered with free shipping and way below MSRP.