this is by far the best purchase i have made for my mustang. it sounds sick. you can hear the air getting pulled in with tons of force. it made my borla atak axle back exhaust a lot more deep and louder. makes the motor much more v8 sounding. as far as the hp and torque gains. i believe the 13hp and 15 torque that it adds. you can really feel the torque gain for sure it really wants to take off much faster and feels like it is pulling much harder. I'm not sure if i got extra power than most for having the borla but i love it. easy to install and worth every dollar.
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