Will you possibly have a harness that lets me use OEM amp for voice but use aftermarket amp + subwoofer for bass ?
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Current:16' X4 M40i Long Beach Blue LEDs 20's 680M | Custom @AimPerformanceNJ Downpipe | @EnzoRacing PTF/BM3
:'14 X3 28i M-Sport AW DHP RaceChip
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Member: BMWCCA #505245