I guess the only other question is how many have they installed in Z4Ms? If they've done them before then it does make it less likely that the install is the problem...good luck.
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Silbergrau A08 / Sepang Brown LSD6 / Carbon Leather 4MY (1 of 3, this combo)
RAC RG63 | Conti EC-DW | GC/Koni-Dinan | Rogue RSM | Arqray | Autosolutions | BMW brace | Pinnacle tint
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