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To the poster who asked about the tunes value with stock exhaust. I have only the oem exhaust mod (stock muffler cut open and replaced perforated pipes), and an AA green air filter only.
It's worth it.
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09 Space Gray E90 M3 DCT: BPM (Stage 1, DCT and Servotronic) tune, Gintani Sport Exhaust, Dinan Intake
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