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Shit you not, my rattle was a bolt (non bmw..) rattling around the left resonator. Shop in STL that installed it mustve kicked a bolt into the pipe...
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Custom Wedge MHD 2+ Aggressive, AR Catless DP, ETS 5 FMIC, BMS DCI, BMS OCC, Berk Axleback, CF Diffuser, CP-E Chargepipe
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