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I think the tone is much better...however, the gains in terms of power is disappointing. Maybe BMW's exhaust isn't that restrictive? Just kind've expected to see more HP from an aftermarket exhaust that's being put on a twin-turbo v8 motor.
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-335xi---Innotech Exhaust---AR 3" Catless---Pro tuned---HPF FMIC---ER Chargepipe---KW V1---Injen DCI---BMW Performance Front Bumper, Rear Spoiler & Door Sills---Vorsteiner wheels---much more- |