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I have a question about if I drive in normal mode when the downpipe was installed, the exhaust sound will be louder than stock how many %?
I like the sound and power gain but sometimes I wanna drive like normal road user with grandma mph on highway ：）thanks
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X5///M WHITE, VELOS STAGE 2, AKRAPOVIC DOWNPIPE + FULL EXHAUST, KW V3 , VORSTEINER FRONT LIP + REAR DIFFUSER.......ETC
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