I just did it too and I noticed a small difference in sound.Nothing that noticable during idle but its definately deeper when your driving and Under a load.Reminds me of my 04 e46 perf.pkg.Cool and easy thing for our cars.I used a screw in the line.
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2021 M5 COMPETITION LCI Brands Hatch Gray on SIlverstone, carbon roof, comp wheels, Mperf splitter, carbon pro spoiler, carbon diffuser , carbon paddles, executive pkg. Dinan HAS, RaceChip, dinan spacers, FC stud kit, etc
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