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Stage 1 And Muffler
thinking about having my dealer do the install of your stage 1 ELITE and just the new muffler,what would the install time be for the two of them and what would the added horse power and torque be , I have 3200 miles on my M240i coupe also can the stock rear defuser be used
Last edited by smokenjoe; 04-05-2017 at 12:47 AM..
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