The ultimate driving machine now sounds like a true sports car. Agency Power has taken the BMW and given it some sound steroids. The Agency Power exhaust has a great tone which gives your car that race sound many desire. The Agency Power exhaust system has been engineered and dyno tested to not only improve the sound, but gain horsepower, and improve top end performance. After months of testing, Agency Power has completed this beautiful valved controlled exhaust. This video demonstrates the aggressive sounds of the BMW M4 with Agency Power’s Valve Controlled Cat-Back Exhaust System.
*Please note that the valves are controlled by ECU depending on what driving mode is selected (Comfort/Sport)
Order the Agency Power Valve Controlled Cat-Back Exhaust Here
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