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JB4 will show in your instrument panel if you set it to. The digital vent gauge from P3cars looks pretty nice. Not sure how big of a PITA the install would be on it.
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335xi: JB4 G5 | KW V1s | muffler delete | BMS DCI | VRSF 7" FMIC | VMR v703 18x8 | and your mom |