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You know what, I am bumping this. The cold start on my car is almost as loud as WOT. I would love to get a more aggressive exhaust, even a race setup, but the cold start would be obnoxious to neighbors and deafening.
It's avoidable if you give it a slight bit of throttle for about 20 seconds and try to hold it at a steady low rpm, but what a hassle.
For JB4 owners, I think Terry should program a "quiet cold-start" option where JB4 sets idle to ~1200 rpm for the first 20 seconds of a cold start. I believe this would eliminate the disproportionately loud start-up that catless N55 owners have been dealing with. I think this would a great value-added feature also.
Feedback from catless N55 owners?
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2019 M5C Matte MBB / Tartufo
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