There isn't that much drivetrain loss on the Auto if any, due to the ratio of the gearing. There are plenty of 7AT's pulling over 300hp+ on similar mods and are basically dead even with the 6 speed.
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Injen Dual CAI | Illuminated Kick plates | Stillen Sway bar kit | F.I TDX w/ 12" Resonators | F.I HFC's | UpRev Tune | 300HP/225tq Mustang Dyno
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