Steeda 2013 Mustang GT - CAI & Tune Dyno Results & Pics
 

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With the 2013 Mustang rated at 8 more horsepower from the factory it baselined slightly higher than other cars we have done. Thanks to the higher baseline numbers the spread from stock to cold air and tune is a little less but still very good and worth the investment. Maybe with exhaust work you may see a little more than previous cars but even then we think the 2013’s will remain comparable to the 2011-12’s in their final numbers as was the case here.

Peak to peak gains achieved are 33 horsepower, with max point to point gains of 36 horsepower. Torque gains peak to peak were 24 ft/lbs with point to point gains of as much as 32ft/lbs.

Final numbers are 405.72 horsepower and 384.02 ft/lbs of torque.

Dyno sheet:
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So basically it looks like FORD just bumped the rating of the motor closer to what the motor actually makes. The actual hp of the 11-12 and 13 are the same. I wondered if they would do something like that since these motors are underated.

What octane fuel, and was this a standard transmission car?

93, and yes.