Thread: OPF/PPF M135i exhaust
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      04-19-2020, 03:48 AM   #4
MrFoxy
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Drives: F40 M135i. G42 M240i
Join Date: Mar 2020
Location: Scotland

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https://drivetribe.com/p/the-opf-pan...ThCm-2lSYEj0AA

Good read this! If your a little confused " like me" about exactly what can/can't be done on our cars regarding sound.
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