Depends on the clutch. Most clutches require 500 city miles to break in. Some of the pucked race discs only need 200-300 city miles...depends on manufacturer though. I wouldn't push it until 500, especially on slicks. Better safe than sorry.
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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