I can tell you're the kinda guy that likes to work on his own cars.
www.helminc.com
Get the service manual...same one as the dealer uses. Don't bother with Haynes or Chiltons, they are crap.
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2015 Ford Mustang GT Fastback - Ingot Silver - 6M - Performance Package - Gibson Catback, JLT CAI, FR 47lb injectors, BAMA E85 tune, Eibach Sportline, BMR wheel hop kit, UPR oil separator, Steeda shifter bushing/bracket
Team B.O.B.® - Ballaz on a Budget