Doesn't matter if it's an s2k or a civic, the FMU sucks either way, and shouldn't be used in either case. You COULD run an FMU on an s2k if you really wanted to...tuning is tuning, and fuel management is fuel management, whether you drive a civic or S2k.
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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